Children designed and constructed a "Ping Pong Ball Run". They used obstacles and varied friction and decline levels to slow down the ball. The aim was to keep the ball moving, for the longest time possible, using the force of gravity alone. They were allowed to use their best time out of three attempts. If the ball stopped for more than five seconds the score did not count. They also showed off their projects to first and second class. They demonstrated, to the younger class, how they measured their times. The other class were then allowed to test it out. Recycled materials (cardboard, paper, tape left over from a build) were used to create the constructions.
