Is this project necessary? Absolutely not. Is this project awesome? Hell freaking yes!
Using the type of engineering skill that I wish I had growing up when I was consistently losing in my school science fair, The Q YouTube channel put together a soda machine using soda bottles, cardboard, a 9V battery, some tubes and wires, a push button switch, and a DC6V mini air pump motor.
After tying together some wires, gluing the cardboard, and sticking some tubes inside the soda bottles, the end result was a DIY tap, kind of like the ones you'd see inside fast food restaurants.
Yeah, it takes a little more effort than my oversimplified description, but with a little help from the video above, this could be a fun science project or just something to do if you're bored at home and happen to have a mini air pump motor lying around.