Instruct: Classify Amazon reviews into positive or negative sentiment
Query: geeky, educational, and pretty dang cool

We use this in a desert terarium in a library. It's easy to assemble, and looks great. Varying the intensity of the light regulates the speed of rotation. It takes a bit more light to start it than it requires to keep the blades moving but that just provides an opportunity to give a quick illustration of momentum (and on electric motors and solar power if kids eyes don't glaze over too fast).The price is a bit higher than I wanted to pay but there seems to be nothing else like it available.We like it, but then we are geekier than most people.