Meffert's Challenge MEGAminx Speed Cube - Professional 10-Level Puzzle for Advanced Cubers - Brain Teaser & Stress Relief Toy for Adults & Teens - Perfect for Competitions, Gifts & Mental Exercise

If you have never solved a 3x3 Rubik's Cube, I recommend trying that first before Meffert's Challenge dodecahedron. And if you're having problems with the 3x3, make sure you search for the solution and explanation on Youtube. You can solve that puzzle! Anyway, Meffert's Challenge is a very interesting little puzzle because it doesn't have the nice orderly rows and columns that the 3x3 has, but instead has "jagged" rows, or layers, which are the key to solving it. It took few days for my son to solve it. It was a lot of fun. He didn't rush, nor did he try to break a time record. And that is the key to keeping your dodecahedron is one piece. You see, it is not built with the highest quality design and materials, which means that if you force turns, it can easily pop apart. You have to be patient, turning when the little cubes are aligned. So far he has solved this puzzled many many times and nothing bad has happened. It has not popped apart. The face stickers have not peeled off -- not even close. I highly recommend this puzzle. It is a lot of fun.