This is one of my favorite science experiments. Place a penny right in the middle of a clean coffee mug. Put it in front of you at your kitchen table, and then place the mug in a place where you can see the penny. Keeping your head still, slowly push the mug away from you to where you can no longer see the penny. Make sure it is just out of your sight line - the penny is now being blocked by the side of the mug. Have someone else slowly add water to the mug - being careful not to disrupt the penny. As water is added (you may have to add a lot), you will slowly see the penny "rise up." It's really amazing. Why does this happen? If you can't figure it out, ask your child! He or she should know!
Magic Penny
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