I will show you how t' make a Vinegar and Bakin' Soda Water Bottle Rocket that will go 50+ feet high, I have seen a lot o' people who do this with t' air pump method, ya bilge rat, and thought it would be cool t' do it with Vinegar and Bakin' Soda instead. Arrr! Here be t' link if you want t' buy a Keychain Camera: shop.ebay.com