Little Treasures 6 in 1 Educational Solar Kit, Solar Power Toy Kit Build six different models with one kit! Create an airboat, windmill, puppy and two different airplanes! Recommended for children who are ten to fifteen years of age or older. Comes with thirty three snap together parts that are easy to use, durable and made of safe materials, including a solar module and gear box and a small motor. While batteries are not required, the kit does run off of solar energy or batteries, making it a great rainy day or indoor homeschool project set! No tools are required to build amazing, creative engineering projects!