We just added 50 new interactive science simulations to SciFunLab — all free, all in your browser, no signup required. Each one is built on the same idea that runs through the whole site: you learn science faster when you can play with it instead of only reading about it. Move a slider, break a rule, and watch the science react in real time.

Here are some of the highlights, by subject.

Physics you can feel

• Magnus Effect — give a ball spin and speed and watch it curve through the air. This is the physics behind a bending free kick or a baseball curveball.
• Fastest Ramp (Brachistochrone) — race a ball down a straight ramp against a curved one and discover why the curve always wins.
• Newton's Cradle, Elastic Collisions, and Terminal Velocity — momentum, energy, and air resistance you can actually see.
• Pendulum Wave — fifteen pendulums drift in and out of sync into mesmerizing traveling-wave patterns.
• Plus Doppler Effect, Standing Waves, Damped Oscillation, Gyroscope Precession, Center of Mass, and Escape Velocity.

Chemistry in motion

• Brownian Motion and Diffusion — watch particles random-walk their way to equilibrium.
• Collision Theory and Le Chatelier's Principle — change temperature and pressure and watch reactions respond.
• pH Scale, Gas Particle Motion, Electrolysis, and Crystallization round out the set.

Biology that comes alive

• Neuron Action Potential — stimulate a neuron and watch the voltage spike race down the axon.
• Predator–Prey Cycles — the classic rise-and-fall of rabbits and foxes.
• Osmosis, Enzyme Lock & Key, Logistic Population Growth, and Blood Circulation.

Mathematics you can see

• Galton Board — balls bounce through pegs and pile into a perfect bell curve from pure randomness.
• Estimating π with Monte Carlo, the Sieve of Eratosthenes, the Golden Ratio Spiral, a Fractal Tree, the Collatz Conjecture, Bézier Curves, Riemann Sums, the Unit Circle, and more.

Computer science, made visual

• Conway's Game of Life — a handful of simple rules that produce endless emergent complexity.
• Floating Point — see why 0.1 + 0.2 doesn't quite equal 0.3 on any computer.
• Bloom Filter, Hash Collisions, Binary Search, BFS vs DFS, Logic Gates, Binary Counter, and Huffman Compression.

Why interactive beats watching

Videos and diagrams explain a concept. A simulation lets you test it — change one variable, predict the result, and check yourself. That loop is where real understanding forms, and it's the whole reason SciFunLab exists.

Every simulation is free, runs in your browser, and needs no account. Explore all the simulations and start moving the sliders — and if you prefer to watch first, our short explainers live on the Videos page.