[Product Description] Easycool is a track block brand playable for all ages and track block is a game that players can get started without learning the rules. It can be played as a single game, a team game and a competitive game. Track block can help children improve their sense of space, logical thinking, concentration, artistic creativity and ability of scientific exploration; [Product Features] The feature of easycool blocks is the addition of tunnel function in inner tube on basis of the surface track function, therefore, more complicated and diverse track lines can be designed, bringing more exciting game experience; Players can start from a simple two-dimensional space construction and gradually upgrade to a more complex three-dimensional construction. Endless combinations of possibilities can be created by using the characteristics of different types of block elements; The power of the track system comes from the fact that the marble accelerates the rolling speed after been driven by the inertia of vertical gravity during the layer transition. Blocks and marbles provide an informal learning environment for young children in which they can experience the scientific principles from constructing games, though "only the how, not the why"; Base building element, the most perfect building blocks for "architects". All sets of the easycool brand are compatible with each other. They can be used independently or in combination with different sets, bringing different kinds of fun. Meanwhile, it is also compatible with many international similar toy brands! [Product information] Brand name: Easycool Model: building cubes Material: German Elm Weight: 3.5kg Age range: 3+ Content of the product: 30 pieces of blocks Size of each block piece: 50x50x50（mm） Size of the package: 325x270x60（mm） Note: To avoid the risk of accidental swallowing (the product contains small accessories), this product is not suitable for children under 36 months. [Natural solid wood] This product is made of natural solid wood. It has no chemical dyeing or addition.It has natural color and texture differences. [Storage Instructions] Since wood is an "activated" material from nature, it may be slightly changed by temperature and humidity. Avoid sun exposure or excessive drying environment, otherwise the wood will crack or shrink; avoid long-term damp and dark environment, otherwise wood will be mouldy or swollen; [Note on packaging] Both easycool and puzzle block are trademarks of easycool studio. In the transition period between new and old brand names, some products still use old brand packaging. Despite the packaging difference, the quality of the products is the same, please feel free to buy and use!