You've made a bottle rocket (or ten) and a sparkler bomb, and now you want to put those empty plastic bottles to a new pyromaniacal use. With a little rubbing alcohol and a match, this video by io9's Esther Inglis-Arkell will show you how to make your own homemade rocket booster in a bottle.
The process is super simple. Pour some rubbing alcohol into the bottle and swirl it around so the entire inside is coated. Pour out the excess so all that's left are fumes. Now, all you have to do is light a match and hold it over the neck of the bottle and you have a small, contained explosion.
Per Esther's advice, it's definitely a good idea to have a fire extinguisher handy. If you don't have one, it's pretty easy to make your own with some stuff you probably already have lying around the house.
You can also start a fire with a water bottle, or ignite different chemicals in a large plastic container to make cool "whoosh" sound effects. If you have a glass jar, you can use it to make green flames with boric acid and antifreeze or this awesome jam jar jet engine, which is basically a smaller version of Esther's experiment, only it uses methanol instead of rubbing alcohol.
Want to master Microsoft Excel and take your work-from-home job prospects to the next level? Jump-start your career with our Premium A-to-Z Microsoft Excel Training Bundle from the new Gadget Hacks Shop and get lifetime access to more than 40 hours of Basic to Advanced instruction on functions, formula, tools, and more.