The Mefferts Hollow Cube twisting puzzle by Recent Toys is a fascinating logic puzzle for one person. Thanks to its coreless design, the hollow cube offers a very special look and new mechanical insights. The goal of this brain teaser is to twist the segments so that each side of the 3x3 cube shows a uniform color. The open segments reveal the internal movements of the puzzle and increase the visual challenge. This original game of patience is ideal for puzzle fans who want to train their spatial imagination and strategic thinking.