Small building block size :The small building block size allows for intricate and detailed designs, making it a great challenge for older kids. Compatible with Lego :The blocks are compatible with Lego, allowing for endless possibilities and creativity. CE certified :The product is CE certified, ensuring that it meets safety standards and regulations. Unisex :The toy is suitable for both boys and girls, making it a great gift option for any child. Blocks name: Space building Blocks By ToylinX toys Gift for: boy/ friend / the children 6 years and up / Blocks fan / collect fans Fit for: the children 6 years and up and Blocks fan Specifications: Block model: LEC866 Product Material: Eco-friendly ABS plastics Assembly method: as picture show Packing content: 1pcs Building Blocks and detailed instructions Reminder: Products has not include the retail packaging unless stated otherwise. (if you need the box please contact the Seller to add more box freight) Size may be 2 cm / 1inch inaccuracy due to hand measure