The freezing process on these bubbles is so beautiful ! they start to freeze at the temperature of -15 degrees, and they captured that on a video, they accelerated the process and the result is fascinating. At the beginning the bubbles turn on their own axis and after, the flakes appear on the bubbles... This is almost supernatural, I really love that ! You can do that at your home if you have a good freezer, you just need soap and water 🙂