Too many kids are now overweight. With computers, video games, and television, they are not as active as we were as kids.
Remind them of the real joys of childhood - running, jumping and hopping. Hopscotch is just one example of a game that will get them out of the house, and it is cheap enough for any family since all you need to buy is a piece of chalk.
Besides building muscles, hopscotch builds coordination. Search your memory for more active games (like jumping rope, tag, freeze, and Simon says) to steer them in the right direction.
If we limit their sedentary activities for rainy days and evenings, we'll be helping them to live longer. Now that's inexpensive health care.