Water gun and ping pong game= hours of fun
Balloon Rockets...Balloon, straw, string, tape!
Yo Gabba Gabba Party: Muno pretzels
Polka dot cake...the secret is cake pops inserted into cake batter! Clever... vary the color scheme for different seasons, holidays, birthdays..too cute!
Could be really cute and cheap (I like cheap) for kids' goodie bags. Make some labels and slap them on some bubbles.