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reliable robust barometer
Make your own planetarium model of our home solar system
and the specially prepared mix
this one also has a 40-page illustrated booklet with instructions
but you supply your container (a clear plastic bowl will do
Tin Can Edge Detector Robot Market reliable robust barometerAssemble your own robot with the remarkable ability to detect table edges and avoid falling over them. Illustrated instructions and necessary pieces included except you supply the can and an AAA battery. An entertaining engineering challenge for all, recommended for 8 12 year olds. Part of 4M's Green Science series
US$ 188.00
US$ 50.00
US$ 107.00
