HydroPower Dart uses water as renewable energy source with ICT, math and chemistry related STEM subjects. Toy contains couple of games including using robot arm by the electricity generated through hydropower dam and hitting the bluetooth powered piezo-dartboard by using turbines and robot arm. By playing games through HydroPower Dart, fundamental principles of density, energy conversion, 2 and 3d movements, speed and physical movement relations will be experienced along with coordination skills.