Puzzles of all types help to improve hand-eye coordination and short and long-term memory. They are designed to test and strengthen your knowledge, skills, and abilities (KSAs). They help to develop a keen relationship between what your eyes see, what your hands do, and what your brain can relate to the information it is receiving. There are also health benefits of solving puzzles, such as improving memory and IQ, delaying the onset of dementia and Alzheimer's, and lowering stress.