Engino Academy of Steam Hydraulics Science Building Block is As an engineer, assemble a hydraulic platform and observe the force of pressurized water to move or lift objects. Industrial and construction machinery uses hydraulics to lift heavy objects with ease. Learn how this is achieved by applying Pascal's Law in a hydraulic press. Understand what hydrostatic pressure is and how depth makes it stronger. Easy adjustment connectivity at any angle and direction. Removal tool for easy disassembly. All parts are non-toxic, long lasting. Pieces in bright colors. Recommended age: 8 to 12+. This set includes: Engino pieces made of ABS plastic, plastic liners and paper outlines, plastic bottle and some pebbles. Additionally, you will need sinks with water.