A friend showed this video in my graduate class the other day and I thought it was completely doable with a group of students as a project. The parts might have to be purchased through a grant though. I'm going to try and convince one of my fourth grade teachers to do this during her light, electricity and magnet unit. It actually fits our sixth grade standards the best but we can squeeze it into the fourth grade as well!
I'll post pictures if we do it :)