Egg Heads Puzzle

As a retirement present for Joe Malkevitch, a geometer friend who likes puzzles, I designed and built this 1′-diameter Egg Heads puzzle from ¼” walnut. Many of my sculpture and puzzle designs require laser-cutting or other computer-guided fabrication technology to accurately produce intricate parts. But this design is simple enough... Read more »

Adult Soapbox Kart

This guide will teach you the basic design aspects you’ll need to consider in order to make yourself a road-worthy gravity-powered vehicle. Full suspension on go-kart wheels, driver restraints, a rigid frame with roll bar, and balanced drum brakes are features of the example kart I’ve built. It weighs in... Read more »