25 Cheap and Easy DIY Halloween Decoration Ideas. So many cute ones like these Trash Bag Spider Webs. Many of the items you may already have on hand. I can hardly wait for Halloween to get here so I can use these.
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.