help your children understand the basics of hydraulic mechanisms with this amazing s.t.e.m. learning d.i.y. project! hydraulic machines use the power of water pressure to carry out specified tasks. from cranes to braking mechanisms, hydraulic power finds widespread use in daily life. another of cool, innovative smartivity stem learning educational d.i.y. toy kits, the smartivity pump it move it hydraulic crane introduces children to the fundamentals of hydraulic machines in the most playful and engagement filled manner. the kit contains all the elements essential to build a fully-functional hydraulic crane, richly-illustrated and easy-to-understand step-by-step instruction booklet and tools to embellish the project once built. once assembled, children can use their hydraulic cranes to life objects and move them around. the project assembly provides at least an hour-long engagement and the game-play ensures that children proudly continue to play with the project even after.