I bought this set of prisms to see what they look like and they are so unique they will be a Christmas present for my nephew who is in elementary school. They are designed as educational tools (but will certainly be used at home simply because they are unique). A booklet is included explaining the different experiments you can do to achieve specific prism effects. I specially ordered this set, Because it's acrylic, not crystal/glass Glass prisms have been known to break with minimal handling, making them impossible to use with children.