I absolutely love the idea of a homemade light saber! Maybe because Star Wars is all my preschool-aged son talks about (and my husband!). I think this is at the top of our list for my son's birthday this year. I am pretty sure I could make all of his dreams come true with this one.
You only need a swim noodle, pvc, pipe, a 1/2 inch pvc end cap, electrical tape, and a saw or knife to cut the noodle and pipe. The complete details for making this can be found here.