Rainbow Cupcakes- for the one year old's rainbow party. Word to the wise. leave the rainbow sour belts out to get stale for a day or two. We had some floppy rainbows. I did rainbow cake inside that you could see through the white liners.
Balloon Rockets - I've done this in several science camps I've conducted. Kids have fun with it. But, when the balloon deflates it may fall off the straw because it's surface area changes - another good thing to show and explain to kids.