Made these from PVC got the instructions from a friend, and i made her one too. costs about 40 bucks in PVC and joints and what ever you can scrounge for the rest. here is the website with the instructions. took about 20 minutes cutting time and 30 minutes to put together and hours of fun to be had, til the boys tear it apart to have PVC sword fights.
http://familyfun.go.com/crafts/the-deluxe-kid-wash-709166/