This is an unopened 12-in-1 Solar Hydraulic Construction Kit for ages 8 and up, offering a fun and educational building experience with 230 pieces to create various models using solar and hydraulic power. Although the box is open, it has been carefully inspected and is in great working condition, ready for its next builder to explore the principles of STEM. Here are the specifications: * **Type**: Solar Hydraulic Construction Kit * **Number of Models**: 12-in-1 * **Recommended Age**: 8+ * **Power Source**: Solar and Hydraulic * **Pieces**: 230
