Organize a Scavenger Hunt
Scavenger hunts are lots of fun and bring out everyone's competitive sides. Depending on how adventurous you're feeling -- and how many adults you have for supervision -- your scavenger hunt can be limited to your backyard, your block or even your entire town.
Use your computer to print out clues, maps and goodies, and hide them places. The clues can be straightforward or written as puzzles or poems. A scavenger hunt is actually a great teaching tool for children because clues can contain simple math problems or local history questions. Leave little prizes along the way (candy, small toys) with one big prize for the eventual winner(s).