I made a homemade playgym for my birds basically using just a drill (but screwdriver works)
Heres a list of materials
-nickel plated screws
-nickel plated screw eyes (for attaching toys)
-sisal and cotton rope (bird-safe)
-natural branches (again bird safe and washed/baked)
-two square wooden boards (I used untreated pine)
-two wooden rectangles (untreated pine)
-three square dowels (two the same height as the wooden rectangles and one the length of the base)
-lots of toys!!
Here's a couple pics, the first two are just after I finished it and the last two are with my sunnie, Briar, playing on it hope this helps