Ages 9–14 · Grades 4–8 · Computer Science

TinkerForge

A little program stamps shapes — and then one line changes. A number, a shape name, a coordinate, a + instead of a −, an if’s threshold. Your job: predict the new picture before you run it. That’s real tinkering — a small change, a careful guess, and a look — not button-mashing.

Every picture here is drawn by really running the code, and the randomness uses a fixed seed so your guess is always checkable. Runs on your device; nothing leaves it.

Like