The Wood Chopper Whirligig Hardware Kit will simplify making the Wood Chopper Whirligig. Start with a copy of the plan that is sold separately, select the wood of your choice. We recommend an outdoor friendly wood or marine grade plywood. Use the Wood Chopper Whirligig Hardware Kit to help you finish the project. You'll also need plywood for the whirligig blades. Our plans are designed to use 5/32" marine grade plywood. This is our #7002 Birch plywood. We sell it as 1/8" but it is closer to 5/32". Most other 1/8" plywoods will be slightly under 1/8" thickness.