Sensing boredom on the horizon? Challenge your child to an aquatic microrace. To play, place two drops of water at one end of a piece of waxed paper (we taped down the corners to keep them from curling). Then snip a drinking straw in half and show your child how to move the water across the paper by blowing through the straw. (Remind him not to chew on the end, or the straw won't work properly.) The first drop to reach the other side of the paper wins. As soon as he gets the hang of it, try racing cotton balls, crumpled-up balls of paper, Ping-Pong balls, or anything else that can be moved by a diminutive airstream.