Whether or not Galileo actually dropped balls from the Leaning Tower of Pisa, this demonstration will solidly demonstrate that objects are accelerated at the same rate, regardless of mass. You will, however, need a vacuum pump and a few...

Let physical science stars experience Newton's first law of motion by blowing marshmallows out of cardboard tubes! Using different lengths of tubing, they find that more force is needed to overcome increasing friction, and they have a...