Attentive behaviour (Blue)
The Thymio responds to the sound of clapping your hands:
2 claps = The Thymio starts moving if it is stopped and stops if it is moving. Three yellow circle leds will be lit.
1 clap = If the Thymio is moving, one clap will cause it to turn right if it is moving straight and to move straight if it is turning right. One yellow circle led will be lit.
3 claps = The Thymio will start to move in a clockwise circle. Five yellow circle leds will be lit.
You can also tap the robot with a fingernail to create a sound like a clap.
Make sure that you do this in a quiet room so that the Thymio isn't confused by surrounding noise.
This Aseba .aesl file contains the source code implementing this behaviour.