Thymio

Thymio is a small open-source educational robot designed for teaching logic and programming.

It features many sensors (proximity, accelerometer, temperature, buttons) and can be programmed in several ways:

Pre-programmed behaviors: Six modes (friendly, explorer, fearful, etc.) to discover its sensors right out of the box.
Visual Programming (VPL): An icon-based interface perfect for younger children.
Blockly/Scratch: For intermediate learners to transition to logical structures.
Aseba (Text): For advanced students to learn text-based coding.

The robot is also compatible with LEGO bricks, allowing kids to customize its appearance and functions.