Newton's Law with raw eggs. Egg will fall into the cup unbroken when pie plate and 'tower" go flying. Pinner said she wished she had a camera or her husband's face when I knocked the pie pan! The kids think this is SO cool!
Did you know that you can build an exploding chain reaction by weaving together popsicle sticks or craft sticks? The chain stays together as long as you hold down the end that you are building … (not sure why this is "for boys")