The robot tells you what it thinks it sees. You can see what's really there. When they don't match, press the red button to correct it. Each correction uses one radio battery, and batteries you don't use are paid out as credits at the end of the leg — so a better sensor pays for itself. In Big mode there's a clock; in Little mode the robot simply waits.

Each place teaches one idea about how AI works, and each unlocks the next. Stars unlock hats and stickers. Nothing here costs money, and nothing on this page talks to the internet. Unlock every chapter