"Build This Cute Walking Stick Robot
A project to build with kids, by Brooklyn Robot Foundry owner Jenny Young.
This little machine is loaded with lessons about engineering and mobility. The gearbox teaches kids how gear ratios affect speed. And when it walks, the robot's feet can slip unless you add a dab of glue to them. That's a great introduction to problem solving: increasing friction to create traction and enable faster movement.
The pipe cleaners are just pipe cleaners. Have fun!.."
Read the full article at its source: http://www.popularmechanics.com/technology/robots/how-to/a14090/build-this-cute-walking-stick-robot/