Fun
Some fun, sometimes interactive, things built either for interest or to help understand them better.
Conway's Game of Life
A full-screen cellular automaton you can draw on. Change the speed, zoom, and birth/survival rules, or drop in presets.
Bonds & Interest Rates
Why a bond's price falls when rates rise. Drag the interest rate and watch today's price move against a fixed future payout.
Where Loan Payments Go
How each payment splits between interest and principal — and how paying a little extra, sooner, saves a lot.
Diversification & Risk
Why holding many investments narrows the range of outcomes while keeping most of the upside — and how fees skim the top. Real 1995–2024 data.
Gravity Sandbox
Fling masses into orbit and watch Newtonian gravity do its thing — they attract, merge, and trace long orbits. Spin up a whole accretion disk and watch it coalesce.
Magnetic Field
Drop bar magnets and watch their field lines weave together. Drag and spin them; opposite poles snap into a stronger magnet, like poles shove apart.