STEM Kit Build Water-Powered Mechanisms This unique kit allows you to build two different systems powered by air and water: water-jet-powered machines and hydropneumatic-powered engines. The hydropneumatic system uses a self-contained system of air and water turbines as the engine. Water-jet-powered machines are a fun outdoor activity, while self-contained hydropneumatic-powered models can be built and experimented with both indoors and outdoors. Compete with your friends to see whose model goes the furthest! 15 models powered by a hydropneumatic engine. ● Two different systems: * The first system has 7 models showcasing the hydro-pneumatic-powered system. - Ideal for both indoors and outdoors as the water is circulated and contained inside. * The second system has 8 models showcasing a water-jet-powered system. - Ideal for outdoors as the water is sprayed outside. ● Includes special parts: water tanks, secure pump, nozzle, air-water power unit. ● A step-by-step illustrated instruction manual guides you through model building and experiments. The pieces in this kit are compatible with the pieces in other Gigo Toys building sets. Contains 165 pieces, 15 models, instruction manual. Recommended age: +8 years. Made of plastic. According to EN71&ASTM regulations. WARNING: Not suitable for children under 3 years old, contains small parts. Adult supervision is recommended during play. Read the instructions before use, follow them and keep them for reference. Made in Taiwan by Genius Toy. STEM Kit Manual Build water-powered mechanisms, Gigo Toys - download the file here