This Mini Mefferts Mini Pillow Cube Brain Puzzle Keyring is an original quality puzzle from the Meffert's range. It is the mini version of the classic Meffert's Feliks Pillow. Instead of solving a color for six sides, arrange the curved rainbow-colored pieces so that each of six sides contain all nine colors! The rows turn smoothly in your hands, and the pieces flow seamlessly from one to the next. This mini puzzle is portable and great for travelling, or can be attached to a bag for on the go. It comes complete with a keychain. It is a perfect gift item for yourself, family, friends, and loved ones. It helps keep kids and adults entertained, while also helping to keep the brain active and healthy. Founded by Uwe Meffert, a renowned puzzle designer, Meffert's seeks to inspire and stimulate the minds of all ages. Whether you are a beginner or a master, there is something for everyone. Made from high quality, durable, recycled ABS plastic, and packaged in plastic-free recyclable packaging. Suitable for all ages from 9 years to challenge younger minds, all the way up to 99 and beyond. Difficulty Level: 4.