The PicoTurbine STEM Plus Playoff will take learning to the next level. Our new Alternator Interface allows students to prove their skills in building the most efficient wind turbines. The interface allows users to read voltage outputs and RPMS in real time. You can have up to 4 students/learners competing at once. Use hair dryers, fans, or even your own breath to power your turbine. This was originally built for Savonius Turbines but is compatible with any type of Alternating Current Generators. Engineer your own Horizontal Wind Turbine or Hydro Turbine and compete against each other. We guarantee you will have a blast for hours on end. This new product is set to redefine Renewable Energy Education in the classroom or even at home. We challenge you to become an armature engineer and take part in our goal to facilitate self-learning. For All Ages and best used with under the age of 10 with adult supervision.