Tail Spin is a delightfully fun toy perfect for mindful fidgeting. Simply flick your wrist and be dazzled by the intertwining gears. You have to see it to believe it! Create magic with a flick of your wrist! * Impossible to put down * Relieves stress * Energizes your ming Tail Spin was invented by Oskar van Deventer, one of the world's most prolific designers of mechanical puzzles. Suitable for ages 8 to adult