[Material]DIY hand crank bubble machine experimental toy is made of quality wooden material, which is durable and wear resistant, can be used for a long time. [Function]Children can learn physical knowledge, develop patience and concentration, and promote fine motor skills. [Handmade DIY]Complete DIY science educational toy kits set. It needs youself to assemble the parts, you can enjoy the Diy at the same time. [Application]Great for DIY subject, science education, development of hobbies and interest. [Gift]The DIY toy can help cultivate children hand skills, creativity and imagination, practical skills, scientific knowledge, a perfect birthday gift for children. Note:1.This is not infant toy, please take away from children to avoid eating. It's DIY kits, needs to finish by yourself. Colour:Multicolor Material:Wood Package Contents: 1 pcs x Science Experiment Toys 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.