Make a backyard bowling alley. Add food coloring to clear plastic bottles of water. Use party streamers as lane margins. Add glow sticks for night bowling. (These would make great outdoor table nightlights also with the glowsticks, gonna try it!
The Iowa Farmer's Wife: Making Faces Magnets - cut out facial feature pictures and glue onto magnets. Kids can rearrange and make fun faces. Would be fun with pictures of people you actually know. Would be handy in a restaurant