There are a million science projects out there that let you fire off some sort of rocket, or blow something up with chemical mixtures. For those of us who would prefer not to deal with science, but have the ability to launch something 100 feet into the air, the Aquapod Bottle Launcher is an easy way to go.

It�s a pretty simple setup, as it only requires a bike pump, water, and a 2-liter bottle. A solid brass check valve will make sure you don�t overdo it, but once the pressure reaches capacity, you�ll be able to fire off your water-propelled bottle to astonishing heights. Just make sure you�re aiming this thing up when it goes off, or you�ll have some neighbors wanting some windows or side paneling fixed. To have one for your very own, you�ll be looking at about $25, so make sure you�re interested enough in this to use it more than once.

https://www.youtube.com/watch?v=GzeN2WCRqt8