Exactly, as a kid some of my "inventions" were quite similar. But it gave me experience and encouragement and the *desire* to do something bigger and better. I was just learning how things worked. Taking something apart and transplanting it, without breaking it in the process, lets you observe all the parts inside that you need to make it work. Then you start learning about those parts, maybe replacing them with others to see what happens, taking the parts off and making them work individually, putting them together to make something else... This is all part of the learning process and some people learn more visually and more hands-on than with theory. Your first project ever as a kid won't be the most amazing thing that's for sure.