I'd also like to find one of those kiddies voice changing devices but this isn't as vital (and I'm not sure how well it would work).

I'm going to a fancy dress thing as Darth Vadar and so definitely need a lightsabre to go with my outfit, where would you find one? Would it be a good idea to simply trawl through all the cheapy shops like the pound ones and hope they stock one?

Any ideas?