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.
29 FUN Crafts For Kids That Adults Will Enjoy Doing Too Balloon rockets! -- 29 creative crafts for kids that adults will actually enjoy doing, too! If you appreciate arts and crafts a person will love this site!
Paper whale craft- I can not read language for this craft, but the pictures demonstrate how to make this whale. Great for ocean and animal studies with whales. I would like to use it for Jonah and the whale bible story.