If you’re someone who grew up unable to walk past a puzzle without first finding at least one piece that fit, you’ll appreciate this modern version of the age-old brain twisters. Shaped organically via computer, these puzzles are one of a kind and are patterned after slices of agate. The puzzle pieces themselves are created based on crystal growth, and the twisting, unique pieces are both easy on the eyes and challenging to the brain. Created by design studio Nervous System, these puzzles are a gorgeous addition to any game room.