3-in-1 hydraulic machinery. •Includes 1 base and 3 replaceable accessories: hydraulic excavator, hydraulic crane, and hydraulic wood loader. •To build, 168 pieces. •Driven by a real hydraulic system. •Improve logical thinking skills. •Explore scientific principles. •No motor or battery required. •360º rotating platform. Contains small parts, choking hazard. Not recommended for children under 3 years. Recommended age 8+. Use under adult supervision. ABS, thermoplastic.