Build your own wooden trebuchet model and customize its operation to find the conditions to get the longest throw. Built from 1/4" laser-cut plywood and a canvas throw pouch, the trebuchet best launches nibs because they are small and somewhat sticky. Wood, bolt, nut, washers, string, and canvas pouch all included. Weight is not included. To reduce shipping costs, no weights are included in the package. 5-10 ounces must be attached to the short side of the throwing arm to make it function properly. Extra string is included for this. Put weight on the string such as extra nuts/bolts, fishing sinkers, or other heavy objects.