The archive.
Things that have rotated off the front page to keep it tidy — experiments first, then the private family tools. Every one is still live.
Experiments
Two arms, infinite chaos
A double pendulum, simulated live. Nudge the starting angle a hair and watch two near-identical runs go their separate ways — chaos, made visible.
StatisticsThe Bean Machine
Drop beads through a wall of pegs and watch pure randomness pile up into a bell curve. Galton's classic, running in your browser.
RunningSpeed & Pace Meter
Flip between speed and pace, compare km and miles, and see what your numbers mean for a 5K, 10K, half, or full marathon.
PsychologyYour 5-factor personality profile
A short Big Five questionnaire that maps your answers onto the five trait dimensions psychologists actually use — no horoscopes involved.
GameBlockdrop
Falling shapes drift down a grid. Slide and spin them to fill complete rows — full rows vanish. Let the stack hit the top and it's over.
PuzzleCan you crack the rebus?
Each rebus hides a familiar phrase in the way words are drawn — their size, position, repetition or direction. Solve three and see how sharp your eyes are.