Baltic Birch Plywood is a fantastic product for many scroll saw projects. It's reasonably priced, easy to cut and comes in a variety of thicknesses. This variety pact from Woodcraft includes 1/8", 1/4", 3/8" and 1/2" thicknesses. For many scrollers it's difficult to find lumber in these dimensions. It's not the first choice for some projects but for many it looks great. Ornaments, fretwork boxes, fretwork clocks all look nice cut from ply.
Baltic Birch ply is a very high quality plywood. Don't confuse it with plywood you find in the big box stores that carry construction grade ply. This stuff is virtually void free and holds up great even with intricate fretwork. If you are interested in giving BB ply a try click the picture above and check out this variety pack from Woodcraft. As a disclaimer, I am an affiliate for Woodcraft and will receive a small commission from any purchase.