Features: 1.Made of high quality material durable and not easy to fade. BPA free safe for kids. 2.Sleek and smooth corner will not hurt your kids' hands. 3.The set also comes with a screw driver to twist and turn the screws into place though your child can also just use their hands if they prefer. 4.Cultivate concentration exercise practical skills help fine motor development and promote hand-eye coordination. 5.If you have any question please feel free to contact us.We will try out best to help you. Notice: Please allow 1-3cm deviation due to manual measurement Actual color may be slightly different from the image due to different monitor and light effect Description: Material:Wood Size:as shown includes: 1 set x Screw Block Toy