This attractive puzzle designed by Martin Watson of UK has the digits 1-9 made from 2 different hardwoods. Your objective is to fit them into the box. Once in the box they form the attractive lattice pattern seen in the photo. Its quite a challenging puzzle, yet addicting to even folks who may not normally tackle a challenging one, as you seem to get close in a short period of time. But don't look to solve this one quickly! An hour would be a fabulous solution time. Comes with wooden base and cover to store nicely.