Summer Adventure Box II

Ya'll might remember at the end of last school year, I gave the kids a summer adventure box and it was a pirate theme. Well, I am thinking that I would do an Olympic theme box this year. Here is what I have thought (not bought yet!) :

Mario and Sonic @ the Olympics (game for the wii)
Magic Tree House book Hour of the Olympics
Frisbees
Bubbles
Swim goggles
a stopwatch
sidewalk chalk

I need some more ideas!! Can anyone think of anything else??