[Fun and educational]: Children's science toys are fun and educational toys that encourage children to learn physical science. [Hands-on ability]: The educational toys are simple in design, which can cultivate children's hands-on ability and improve their creativity and . [Solar energy]: The solar electric mechanical dog is very suitable for children aged 8-12. [Parent-child interaction]: DIY science toys are also a good opportunity for parents to spend time with their children and create beautiful memories together [Exquisite gift]: This DIY puzzle model is a great birthday and holiday gift for children and adults who like science. Size:13.5cmx7cmx8cm Colour:As Shown Material:ABS Package Contents: 1 * Mechanical Complete Dog 1 * Replacement Mechanical Cathead Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.