Hi Jeannie, in order to properly bend wood you'd need a "steam box", which the average person doesn't have. However, bending wood "somewhat" can be accomplished by making kerf cuts on the inside of the wood. You stated that the plywood is 1/8" thick, which is very thin so I don't know if doing kerf cuts will work but it's worth a try. Kerf cuts are cuts made across the 3" (in your case) about every 1/2" (or so) and normally 1/3 to 1/2 the thickness of the board. Because of the thickness of your wood, I would make the cuts about 1/32" or about the thickness of the first ply of the wood. Good luck!