Make economics click.
Interactive simulations that turn abstract economic ideas into something you can see, adjust, and play with — free, in your browser, no account needed.
Built for high-school and university students, their teachers, and anyone curious about how the economy works.
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Jump in and explore on your own — instant, no account.
- MicroeconomicsIntroductory
Supply & Demand
Shift the curves to see how equilibrium and price controls play out.
You’ll learn: See how supply and demand set the equilibrium price, and how price controls create shortages or surpluses.
- microeconomics
- markets
- prices
- MicroeconomicsIntroductory
Budget Constraint & Utility Maximization
Spend a fixed income on two goods and find the bundle that makes you best off.
You’ll learn: Understand a budget as a real boundary on choice — why getting more of one good means giving up another, and where the best affordable bundle sits.
- microeconomics
- budgeting
- choice
- MicroeconomicsIntermediate
Monopoly vs. Perfect Competition
See how a monopolist restricts output and raises price — and the deadweight loss that market power creates.
You’ll learn: See how a monopolist restricts output and raises price, and why that creates deadweight loss.
- microeconomics
- market power
- efficiency
- MicroeconomicsIntermediate
Externalities & Pigovian Taxes
See why a negative externality makes a market over-produce — and how a corrective tax restores efficiency.
You’ll learn: Understand why negative externalities cause overproduction and how a corrective tax aligns private incentives with social welfare.
- microeconomics
- market failure
- efficiency
- MicroeconomicsIntermediate
Tax Incidence & the Laffer Curve
Put a tax on a market and see who really pays it — buyers or sellers — how much value it destroys, and why raising the rate can't raise revenue forever.
You’ll learn: See that the side a tax is placed on doesn't decide who bears it — elasticity does — and that raising the rate eventually lowers revenue.
- microeconomics
- public finance
- taxes
- MarketsIntermediate
Comparative Advantage & Gains from Trade
Discover why two producers both end up better off by specializing in what they give up the least to make.
You’ll learn: Discover why two parties both gain from specializing by comparative — not absolute — advantage.
- markets
- trade
- specialization
- MicroeconomicsIntermediate
Market for Lemons
When buyers can't see quality, good sellers exit and the market can unravel — Akerlof's model of adverse selection.
You’ll learn: See why hidden quality (information asymmetry) drives out good products and can collapse a market — the mechanism behind scams and “too good to be true” offers.
- microeconomics
- information
- fraud
- FinanceIntroductory
Compound Interest
Watch a lump sum grow, and see why compounding beats simple interest.
You’ll learn: Understand how compounding makes money grow exponentially over time, and how rate, frequency, and horizon affect the outcome.
- finance
- saving
- growth
- FinanceIntroductory
Credit-Card Debt Trap
Compound interest in reverse: see how paying only the minimum keeps a balance alive for years.
You’ll learn: Feel how the minimum payment creates an illusion of control while interest compounds the balance — and how paying a bit more slashes both the time to payoff and the total interest.
- finance
- debt
- behavioral
- MacroeconomicsIntroductory
Inflation & Purchasing Power
See how inflation quietly erodes what your money can buy — and whether saving keeps up.
You’ll learn: Understand why money loses value over time and how inflation differs from nominal growth.
- macroeconomics
- inflation
- money
- MacroeconomicsIntermediate
Phillips Curve
Trade inflation for unemployment in the short run — and see why that tradeoff vanishes in the long run.
You’ll learn: Understand why policymakers can trade inflation for unemployment in the short run but not the long run.
- macroeconomics
- inflation
- unemployment
- MacroeconomicsAdvanced
Solow Growth Model
See why saving and capital build a richer steady state — but only productivity sustains long-run growth.
You’ll learn: Understand why capital accumulation alone yields a steady state rather than perpetual growth, and that only productivity shifts long-run living standards.
- macroeconomics
- growth
- capital
- productivity
- Behavioral economicsIntermediate
Hyperbolic Discounting & Present Bias
See why your future self and present self disagree — and how present bias flips a patient plan into an impulsive choice.
You’ll learn: Understand why a future self and present self disagree, and how present-biased discounting differs from rational exponential discounting.
- behavioral economics
- intertemporal choice
- self-control
- Behavioral economicsIntermediate
Prospect Theory: Loss Aversion & Framing
Feel why a possible loss looms larger than an equal gain — and how the framing of a bet flips the choice.
You’ll learn: See why people are risk-averse for gains but risk-seeking to avoid losses, and how framing exploits that asymmetry.
- behavioral economics
- risk
- decision-making
- Game theoryIntermediate
Prisoner's Dilemma
Play repeated rounds against classic strategies and watch cooperation pay off — or not.
You’ll learn: Understand why rational players defect in a one-shot game, yet cooperation can emerge when the game is repeated.
- game theory
- strategy
- cooperation
- FinanceIntroductoryOver time
Savings Sprint
Split your paycheck each month for a year and watch compounding reward saving early.
You’ll learn: See how consistently saving a share of income compounds into a meaningfully larger balance over time.
- finance
- saving
- FinanceIntermediateOver time
Personal Finance Journey
Live a simulated financial life month by month: earn, budget, invest, and weather life's surprises.
You’ll learn: Build the habits of budgeting, saving, diversifying and managing debt by living a multi-year financial life and watching the consequences compound.
- finance
- saving
- investing
- FinanceIntermediateOver time
My First Business
Run a coffee stand month by month: set your price, order stock, spend on marketing — and learn why profit and cash are not the same thing.
You’ll learn: Learn how a small business really works — margins, break-even, and the difference between being profitable and having cash — by running a coffee stand and living the consequences.
- finance
- entrepreneurship
- business
- FinanceAdvancedOver time
AI Startup Founder
Found an AI-native startup and run it month by month: build the product, set your pricing and model tier, spend on growth, and hire — and learn burn, runway, and SaaS unit economics by living them.
You’ll learn: Learn how an AI-native software startup really works — burn and runway, subscription unit economics, why every free user costs inference money, and growth vs. default-alive — by founding one and living the consequences.
- finance
- entrepreneurship
- startup
- saas
- ai
Multi-user · Classroom
Live sessions a teacher runs with a class. Preview the lesson, then join with a code.
- MarketsIntermediateClassroom · requires code
Double Auction
Run a live trading pit: buyers and sellers post bids and asks, and the market discovers a price with no one in charge.
You’ll learn: See how a competitive market converges to equilibrium and why that outcome is efficient.
- markets
- trading
- equilibrium
- Game theoryIntermediateClassroom · requires code
Public Goods Game — Save the Commons
A class-wide cooperation game: each round, contribute to a shared Climate Fund and watch how free-riding emerges.
You’ll learn: Understand why shared goods get under-funded and how individual incentives drive free-riding.
- game theory
- cooperation
- public goods
- Game theoryIntermediateClassroom · requires code
Tragedy of the Commons — The Fishery
A shared fishery everyone harvests from: each round, decide how much to catch and watch whether the stock survives the class or collapses.
You’ll learn: Feel the conflict between individual gain and collective sustainability, and why rules or quotas exist to manage shared resources.
- game theory
- externalities
- sustainability
- MicroeconomicsIntermediateClassroom · requires code
Insurance & Risk Pooling — The Risk Pool
Everyone faces the same random loss. Play one round going it alone, then one round sharing a common fund, and watch how pooling smooths who ends up wiped out.
You’ll learn: See that insurance doesn't reduce total losses — it spreads them, so no single person is wiped out — and why an emergency fund and insurance play different roles.
- microeconomics
- insurance
- risk
- Game theoryIntermediateClassroom · requires code
Keynesian Beauty Contest — Guess ⅔ of the Average
Everyone secretly picks a number 0–100; whoever lands closest to two-thirds of the class average wins. Watch guesses spiral toward zero.
You’ll learn: See why 'everyone is rational and knows everyone is rational' fails in practice, and how strategic reasoning deepens across rounds.
- game theory
- behavioral economics
- strategy
- Game theoryIntermediateClassroom · requires code
Ultimatum Game — Fairness & Rejection
Paired up, a Proposer splits 100 points and a Responder accepts (both paid) or rejects (both get nothing). Watch fairness beat cold self-interest.
You’ll learn: See why people reject 'free' money when a split feels unfair — contradicting the self-interested prediction that any positive offer is accepted.
- game theory
- behavioral economics
- bargaining
- Game theoryIntermediateClassroom · requires code
Trust Game — Trust & Reciprocity
Paired up, a Trustor sends some of 100 points, it triples on the way, and the Trustee chooses how much to send back. See how trust creates value and reciprocity sustains it.
You’ll learn: See why people send and reciprocate even when self-interest predicts sending nothing — and how trust unlocks a surplus that benefits both sides.
- game theory
- behavioral economics
- cooperation
- Game theoryIntroductoryClassroom · requires code
Dictator Game — Fairness Without Strategy
Paired up, a Dictator alone splits 100 points and the Recipient simply receives — no accept or reject. With zero strategic pressure, whatever is given is pure generosity.
You’ll learn: See that giving persists even when the recipient cannot reject — isolating genuine generosity from the fear of rejection that drives the Ultimatum Game.
- game theory
- behavioral economics
- fairness
- Game theoryIntermediateClassroom · requires code
Stag Hunt — Coordination & Trust
Paired for several rounds, each of you picks Stag (hunt together for the best payoff — but only if your partner joins) or Hare (a safe, fixed reward alone). See whether trust builds toward the payoff-dominant outcome or retreats to the safe one.
You’ll learn: See how the best outcome needs mutual trust rather than beating a temptation — and why players may retreat to the safe choice even when cooperating is itself an equilibrium.
- game theory
- behavioral economics
- cooperation
- Behavioral economicsIntermediateClassroom · requires code
The Bubble Game — Speculation & Herding
Trade a single asset whose true value is fixed and known. Each round, buy, hold, or sell — and watch the price detach from fundamentals, climb on herd buying, then crash. A vivid lesson that 'the price went up' isn't the same as 'it's worth more'.
You’ll learn: See how an asset with a known value can trade far above it — driven by the hope of reselling to a greater fool — and why chasing a rising price is risky.
- behavioral economics
- finance
- markets
- Game theoryIntermediateClassroom · requires code
Bertrand Competition — Price Wars
Paired as two firms, you both set a price each round. The cheaper firm captures the whole market, so undercutting spirals the price toward marginal cost — the Bertrand paradox: just two competitors can behave almost like perfect competition.
You’ll learn: See how price competition between just two firms can drive the price all the way down to marginal cost, leaving almost no profit.
- game theory
- microeconomics
- competition
- Game theoryIntermediateClassroom · requires code
Cournot Competition — Setting Output
Paired as two firms, you both choose how much to produce each round. Total output sets the market price, so output and price settle between the monopoly and perfectly-competitive outcomes — quantity competition keeps some market power that price competition destroys.
You’ll learn: See how quantity-competing firms land between monopoly and perfect competition — keeping some market power that price competition would erase.
- game theory
- microeconomics
- competition
- Game theoryIntermediateClassroom · requires code
Design a Contract — Incentives & Effort
Paired up, an Employer designs a pay scheme (fixed wage + profit share) and a Worker chooses how hard to work. See why pay is structured the way it is when effort is hidden.
You’ll learn: See why employers can't simply pay for effort they can't observe, and how the mix of fixed wage and profit share trades off risk-sharing against incentives.
- game theory
- contracts
- incentives
- MarketsIntermediateClassroom · requires code
Common-Value Auction — The Winner's Curse
An item has one unknown value; everyone gets a noisy hint and bids. The highest bidder wins — and often overpays. A vivid lesson in overconfidence.
You’ll learn: See why the winner of a common-value auction is usually the one who overestimated it — so winning bids systematically overpay.
- markets
- behavioral economics
- auctions
- MarketsAdvancedClassroom · requires code
AI Startup Race — Compete for the Market
Every founder runs an AI startup in one shared market. Each round you set price, marketing, model tier and free tier; the market splits customers by who's most attractive. Live rivals teach what a scripted demand curve can't: competition compresses margins.
You’ll learn: Feel why competition compresses margins: pricing only wins share at the cost of margin, differentiation beats imitation, and your plan is only as good as your rival's counter-move.
- markets
- entrepreneurship
- competition
- MarketsIntermediateClassroom · requires code
Market Day — Run a Stall on the Square
Every player runs a stall on one town square, selling to a shared crowd. Each market day you chalk a price, order stock (paid up front), and pick marketing; the crowd splits by who's cheapest, loudest and most trusted, unsold stock spoils, and a sold-out stall watches its customers walk to a rival.
You’ll learn: Feel why your price is relative and your stockout is your rival's sale: order stock before you know demand, and the whole square can over-order and eat the spoilage together.
- markets
- entrepreneurship
- competition
Play at home with your family
Loved a game in class? Host the same market game at the kitchen table — you against your family, in about fifteen minutes. No account is needed to join.