to teach children about germs spreading!! put glitter in your hand sanitizer, rub it all over your hands then shake hands with child, the glitter spreads from hand to hand. it'll only take a moment before he notices the glitter - then discuss the transfer of germs and that germs are unseen. Go wash your hands, notice that some glitter remains - to get rid of the germs have a discussion about proper hand washing (use soap, wash long enough...)
Calm Down Spot? Rain Bottle -fill a dry empty bottle with a box of toothpicks. Add rice (uncooked) to the bottle leaving an empty space of about 1 1/2 inches at the top. Seal the lid. As you gently turn the bottle, the rice falls through the toothpicks, sounding like rain.