Animated Dolphin Crystal Twister with Blue Crystal This has to be one of the most spectacular optical illusions that we have ever seen When the spiral catches the slightest breeze it spins - watch the glass ball as it appears to climb or fall without ever reaching the top or bottom. This hypnotizing Animated Crystal Twister is topped with a holographic Animated Dolphin design made of 20 gauge steel and powder coated for durability and weather resistance.