The Sunspotter is a folded achromatic refractor made of baltic birch plywood that projects a 3 ¼ x 3 ¼ image of the sun on a white piece of paper. It's designed for use with small groups, particularly with children. There are a number of advantages to using this type of a system for solar viewing when you are working in a group. The two largest are probably that you don't have to worry about the filter coming off the telescope, and that several folks can view at once. It's easy to use, transport and set up. So easy, that as an educator, I would have no qualms about giving it to younger students to use on their own, after appropriate instructions. It can be setup in minutes and used indoor or out. The instructions are very simple and contain decent lesson plans – mostly suggestions for questions and projects, further these can easily be adapted for any age group.