Some sort of crawler has long been a favourite for introducing the ideas of velocity and acceleration. This product has a three position switch so that it can be powered in either direction, a stable platform for carrying objects, a hook for towing and blunt ends for pushing. A spacer is included to take the place of one battery for half speed operation. Requires 2 AA-size batteries.
Constant Speed Vehicle
$72.55Price
3-5 days
