DIY Puzzle Piano 3D Wooden Puzzle * PERFECT STEM ACTIVITY for ages 8 and above * NONTOXIC, no tools needed * 74 PRECUT wooden pieces * ASSEMBLY TIME: 1-2 hours Exquisite Details: This DIY Puzzle is made of high-quality materials and first-class laser-cutting technology. The design is novel and unique, which distinguishes it from other 3D wooden toys. There are detailed instructions in the packing box, easy to understand, and ensure an easy and smooth assembly process. Enjoy Fun: This DIY Puzzle is suitable for both adults and kids aged 8+. It’s a great art project for parents and children to finish together. Easy Assemble The English instruction is very clear and it also includes a small piece of sandpaper whether it was needed or not. All the boards are laser precut, very easy to pop them out of the board. It's also a perfect gift choice for young children for entertainment and education building blocks.