This is a 10 to 12 step puzzle box. It features a classic sci-fi theme. The knobs on the sides are a rocket, a ufo ,and an alien which require manipulation to solve the puzzle (among other moves). Its made from the exotic woods canarywood and bloodwood. It measures 5.5 in. long 4.25in. wide and 2.25in. tall. It rates about 4 out of 5 in difficulty. Please store properly. Wooden puzzles with tight tolerances are affected by atmospheric conditions and must be stored between 40% to 60% relative humidity to maintain proper function.