Scrab Robot Kit (Sound Sensor) .
Scrab is a robot that makes use of two touch sensorsto detect obstacles.
When its Antennal (Touch Sensor) detects an object in its path, Scrab
will go backward first and automatically follow a two step maneuver
to overcome the obstacle. The step can be a combination of Right, Left,
Reverse or Stop. The robo can be configured for different set of
movements.