Learn with Crabby

Short, honest guides for parents, teachers and young makers: free lessons, block coding, and building a real robot crab.

• A free robot coding lesson for kids (ages 8–14), ready to teach in 45 minutesA free, printable 45-minute robot coding lesson for kids 8–14: learn sequences with a cute crab robot in the browser. Worksheet, teacher notes and answers included.
• Blockly robot simulator: from drag-and-drop blocks to real Arduino codeHow the free Crabby Blockly robot simulator works: kid-friendly blocks, a 3D crab with sensors, and live generation of real ESP32 Arduino code.
• DIY ESP32 robot crab: parts, wiring and an honest status reportBuild your own six-legged robot crab with an ESP32, a PCA9685 and 14 SG90 servos: 3D-printed parts, wiring, firmware and an optional custom PCB. Maker Preview status explained.

Prefer to just play? Open the free simulator or download the free Lesson 1 PDF.