A Hidden Marble Maze. Very difficult to solve.Made from the left over wood purchased for Wooden Puzzle 2 plus some nice Red Oak for the outside.The inside is made of 1.1"x0.2" Pine Lattice (Home Depot) and .25 inch (planed to 0.20") red oak. The outside is .65" Red Oak.Most people don't have a planar available to them, so these non-standard sizes aren't too helpful. You're welcome to extrapolate the idea and redo the design for "standard" lumber sizes...but I think "standard" lumber sizes are retarded. The inside layers were glue together pretty haphazzardly. The outside (expensive wood) was mitre cut, clamped and gluedd together with monor difficulty (requires a bunch of clamps...). Gaps were filled with a mix of wood glue and saw dust, not with wood putty. Outside was sanded to death and then got 2-3 coats of Antique Walnut Minwax 2-in-1 Stain/Polyurethane.