Fidget spinners are some of the most popular, and perplexing, toys on the shelves today. Marketed as a treatment for ADHD and beloved by kids across the country, these simplistic spinners do little more than, well, spin. Sounds a little boring, right? If you want to make these children’s toys more exciting, all you need to do is add a few rockets. That’s what YouTuber The Backyard Scientist did, and his enlarged, custom-made aluminum spinner reached speeds of 5,294 RPM with the help of three E-sized rockets. It should go without saying, but don’t try this at home.