There you go you have a brand new longboard and it didn't cost that much. Go out ride it, show it off, do whatever you want with it its's yours.
Step 2: Gluing the Wood
Take your three layers of 1/4" plywood and glue the first two layers together. Once the glue is dry you can glue the third layer on. Dont forget to clamp your wood or if you don't have any clamps plie a bunch of heavy stuff on top.