Please note that the mixed delivery of the original version and the new version, you may receive a different version. The bricks are very tiny, please look at the pictures before ordering. We suggest holding the parts with tweezers (not included). Instructions can be a little complex, be patient and you'll appreciate it. Once the first few layers are done, it becomes much easier. Materials: Plastic. One set including 1350 pieces. Instructions included. The product meets the criteria and is suitable for 3+. However, based on customer feedback, we recommend for ages 14+. It's also a fun, pressure-reducing adult leisure game. Great gift for anyone who loves building blocks. Good for display. Due to building block craftsmanship, if there is any problem during the installation process, such as missing parts or installation manual. Do not hesitate to contact us We would be here to help