Perhaps the most fun you can have with 4 pcs of wood.
A brilliant Stewart Coffin design that combines elegance and apparent simplicity into something that is actually cunningly diabolical. Despite only being 4 pieces, few will get this one quickly. The goal is to get all 4 pieces into the rectangular opening in the base. The puzzle sucks you in as it seems you are always on the verge of solving it, but the solution remains elusive for much longer than you might expect. It’s a great one to leave out on a desk or coffee table as its very unintimidating and people will want to try it. It comes packaged unsolved, as shown in the photo. A written solution is included however.