Fireplace & Wood Stove Grates features: Gear technology building blocks children's educational and creative mechanical assembly toys(Color-2） Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Colour:Color-2 Gao Bole Little Knowledge SeriesinformationMaterial: Plastic/PlasticThis product is a kind of pelletized toy. Can be assembled into the model shown in the picture. A detailed assembly diagram is enclosed in the box. Let your baby give full play to his imagination and find more interesting combinations. The assembling of the three-dimensional image also exercises the hands-on ability and spatial thinking ability. It is also helpful to understand the various graphicsThrough some actions, the visual input is processed. Good hand touch and eye coordination can help babies recognize and distinguish colors simply and accuratelyIntegrate the power transmission between physics knowledge and machinery, the principle of lever and the principle of pulley block, etc. into the building block toy, entertaining and cultivating the baby's knowledge of physics.