Explore the wonders of motion, friction, thrust and propulsion with this project! Smartivity projects are designed to help children learn the skills required for success in real life, and all-around development. Build a fully functional hydraulic crane and introduce children to the fundamentals of hydraulic machines, crane mechanics, pressure, movement and rack-and- pinion mechanism. Kids can push the syringes to direct the crane, lift objects, and move them around. Learn how the power of water pressure can be used to carry out tasks in daily life. Can be painted or colored once assembled. Contains 256 pieces including syringes and pipes, engineered wood components, and step-by-step instruction booklet. D.I.Y. time: 60 minutes / Play time: unlimited. Ages 8 years and up. Meets all ASTM, US CPSC, and CPSIA safety standards.