What do you do when it's really, really hot? You take your favorite mode of transportation- the tricycle- to the car wash and cool off. We loved the idea of a tricycle car wash when we saw it last winter in a children's museum, but taking it outside makes even more sense in the summer. Rainbow colored sponges and streamers, plus a little water, make for a car wash that will keep them coming back again and again.
As Stitch and Soiree points out, this would make a really cute theme for a summer birthday party as well.