Marble Climber 3D Puzzle laser wood cutThis is a perfectly designed DIY kit that requires your hands on work to complete. The whole set is extremely well designed, with very tight tolerances and good machining. The interlocking mechanisms are pretty ingenious. Details are already cut and ready to assemble. The wood is beautiful and smooth. With Laser Cutting Technology, the pieces are easy to remove from the sheet of plywood, the laser cutting is precise and clean (no residue smoke burns).