Ahhh! This robot is nearly perfect... It costs less than £2 to make and draws really interesting patterns. Alter the angle of the legs and you get different sized circles. Lovely!
All you need to make...
The coat hanger-pen-motor combination offers endless possibilities for experimentation...
What will children learn?
Making this robot enables children to become familiar with output devices, in this case a motor. By highlighting the lack of a controller and sensor input children can appreciate that this is not a digital device. Children can also think about the role a controller and sensor could play. I wonder if a Circlebot could be made that followed a program in response to a sensor?