Description: DIY assembled walking mechanical robot toy model kits set?educational science physical DIY energy conversion experiments toy Energy conversion principle : electric energy convert ?3*AA Batteries needed?to motion energy through mini motor Including parallel or series circuit?electrode physical and mechanical principle tips for kid child learning studying Develop children's hand & eye coordination, and help children experience the theory of power, expand kids scientific & mechanical interest Great scientific experiments lab teaching aids school supplies?Cool designed DIY scientific toy gifts for kids Main Material: Plastic Color?Multicolored Specification: Need to be assembled by yourself: assemble the model as the pictures shown Size Chart: Assembled size (L*W*H): Approx 22*12*9cm/ 8.66*4.72*3.54 inch Package Includes: 1 Set DIY Mechanical Robot Toy (with assembled picture instructions) Note: Due to the manual measurement, please allow 1-2mm differences in size Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand