Build a 3" long wood car and test gravity. A heavy steel ball weighs down the front end causing the car to move and respond quickly in the direction of gravity as the road surface tilts and slopes.
One flexible pipe-cleaner doll and detailed instructions included. Walter Kraul of Germany.
To build: age 8 and up. To play: age 4 and up.
WARNING: CHOKING HAZARD -
Small parts: not for children under 3 yrs.