Mechanical brainteasers are handheld puzzles and games that are each completed in a unique way, requiring ingenuity and creativity to solve. One of our metal brainteasers at Spilsbury, for example, involves rotating interlocking rings until they've separated, while another might require turning parts of a lock until it opens. Outside of 3D interactive puzzles, Spilsbury offers a variety of puzzle books (like crosswords) that also challenge a person's problem-solving skills.