Allow the objects to roll down the incline plane. The first object down the incline plane is the winner of that race. The winning object races the winner of the next race. Repeat process until all eight races are completed in the first round. If there is a tie try switching the position of racing the objects.
Race objects back to back.
If one object clearly pulls away from the other that object will be faster. Ask the children to make observations about the nonwinning objects and do the same for the winning objects. Repeat the process until all races are completed. Ask the children to make observations about the winning objects and the nonwinning objects. Tell the children that you would like to have some fantasy races with more objects.