Specifications:This treadmill machine model is designed to enhance children& 39;s concentration, patience, observation, imagination and hand-eye coordination.Kids can assemble the wood pieces by themselves, understanding the basic knowledge of science and physics from an early edge.You can give this exquisite gift to your kids and children who really love DIY assembly in daily life.Item Name: DIY Assembly Treadmill ModelMaterial: Wood, Electronic ComponentsPower Supply: 2 x AA Batteries (Not Included)Feature: Durable, Smooth Surface, Teaching Aid, DIY GiftFinished Size: 18cm x 10cm x 12cm/7.09" x 3.94" x 4.72" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 Set of DIY Assembly Treadmill Model (Others Not Included)