DIY Electric Sweeping Robot Model Physical Science Experiment Invention Children Creative Toys

Specification: Material: Wooden+Plastic Color: As pictures shown Size (L x W x H): Approx 140x55x45mm Weight: 100g Features: 1.DIY sweeping robot floor cleaner model assembly kits. 2.Great educational science energy conversion experiments toy. 3.Working principle: turn on electricity, the motor drives the eccentric weight on the rotating shaft to rotate to generate eccentricity, then brush shake up and down to make the bristles change shape to generate elasticity, then sweeper robot walk and rotate. 4.Develop children's hand & eye coordination, help children experience the theory of power, and expand kids scientific & mechanical interest. 5.Good physical & scientific toy. Package Included: 1 Set DIY Sweeper Robot Toy