Made for the curious.

Made for my kids, and yours. Set reading goals, track progress, and celebrate every chapter along the way.

Explore a living world at every scale. Travel from the human body into cells, watch molecular machines at work, and zoom all the way down to quarks.

Orbit a black hole, bend starlight, and explore glowing disks, relativistic jets, and a universe of nebulae. A front-row seat at the edge of the unknown.

Build a little universe. Place planets, shape their orbits, and compare how gravity and motion change the passage of time.

Explore a world of flat shapes. Pass three-dimensional visitors through the page, watch their changing slices, and switch perspectives to see the whole picture.

See multiplication come together. Build arrays, rotate equal groups, split tricky facts into smaller ones, and practice your times tables.

Make fractions with pizza, cookies, and milkshakes. Slice, add, subtract, and multiply your way to understanding.

Build an atom, peek inside its particles, and discover the colors of atomic light. The periodic table is your playground.

Explore a living human cell through a virtual microscope. Switch imaging modes, adjust the focus, and reveal the structures that keep it moving.

Meet the minds behind the mathematics. Follow 45 mathematicians from antiquity to the Renaissance, and explore their ideas through hands-on visual lessons.

Build a band of singing cats. Layer their meow loops, tweak pitch and speed, and tap the sun to bring everyone into tune.

29 fun camera filters to play with. Which is your favorite?

Skip the small talk. Explore thousands of questions for partners, friends, family, and yourself. Pick a deck, share a story, and go a little deeper.

Type like a movie hacker. A simulated terminal with fictional commands, dramatic popups, and an absurd take on the reality of hacking.

An interactive look at humanity's media explosion, and why we already have more great work than one lifetime can hold.

Are you tired of weeding through all the junk in Amazon search results? I was. So I made this simple Chrome extension to filter results to high start counts and high ratings. Give it a try!

Explore recently solved math problems, the people behind them, and where AI helped along the way.

A simple rule with a surprising amount hiding inside. Explore the solutions, spot patterns, and search for more. Grid sizes in the high 70s and above have not yet been solved.