I bought two different frequencies of these puzzles and haven’t worked on them yet but I’m impressed with the quality of these puzzles. I’ve never done a wood puzzle but I’m looking forward to handling the pieces. And each puzzle has a poster of the final image that is the size of the finished puzzle. I think it’ll help in doing the puzzle and can be displayed to entrain with it frequency. There are also three or four flat wooden pieces with cuts into them but no instructions on what they’re for.