This is made from a 3 3/4” square piece of 2/4 with a pine cap on the end. This is a fun way to keep the kids busy in the back seat and it only took you 45 minutes to make. This can all be done with limited tools and scraps. All you have to buy is the marbles!!! The piece measures 3 3/4” square x 1 1/2” thick (a standard 2×4). The divots are made using a bull nose router bit in a drill press. The end grain contains two holes that hold 4 marbles per side all contained by a rotating cover, also made from pine. I wood burned the lines along with my brand and put 2 coats of spray lacquer for protection and shine.