We did this last April and it was a big hit! My sons made the double sided light saber (I believe that is Darth Maul's light saber).... it's a pain in the butt to have in the house, though... it's really long. LOL.
My youngest son just wants to buy the kit to build his own next time. He said he saw these kits in a few stores & in the Once Upon a Toy store, so we'll just go that route.
hint for those who haven't done this yet... it's not necessarily easy, so ask a castmember for help to be sure that you get all the parts you are supposed to get for your light saber.