Little Treasures 6-in-1 Solar Kit is an Educational and Entertaining Way to Learn & Play! Build one of six different models that are great fun to build. The fan is practical, a plane or airboat is a great toy to experiment with, and a windmill is fun! Recommended for children who are ten to fifteen years of age or older. The kit includes all of the thirty three safe and durable parts needed to build one of the models at a time. Assembling the model toy is just the start of the process  the best part is powering the toy with solar energy! Learning about alternative energy and environmental responsibility is a great side-benefit of this amazing toy!