I'm in charge of a nature treasure hunt for kids 2-5 years old tomorrow at a park. Does anyone have ideas of what I could do? I need something cute. The moms will be there to help them find things. Thanks ahead of time!

Serious answers only please. I've had a sick baby for the last 7 days and a whinny 2 year old and my husband just got deployed to Iraq. I've been a little preoccupied.