Make a bottle rocket adapter just using recycled materials! All you need is a soda bottle, a cork, and bike inner tube (plus a drill and a bike pump for tools.)
What I love about this method is that it includes a way to take any cork and make it fit a bottle using the magic of microwaves!
This project was originally inspired by the howtoons about bottle rockets
. My friend Will Macfarlane and I played with it a lot but found it tough to do with kids ages 6 - 8: the inner tube stopper would come unwrapped and kids had trouble putting it back together, let alone making it on their own. We got into microwaving everything in sight one week, including everything in Star's microwaving instructable
, and realized that corks expand when microwaved.
This led to a new way to make bottle rockets! We've used this at Camp Kaleidoscope since '07.