This elegantly simple puzzle offers two challenges all wrapped in one intriguing device! The objective of the 4T Puzzle is easy to guess just from the name: can you fit four T-shaped pieces interlocking together into the double-sided, square frame? One side is wider, and the other is a bit narrower. There are actually multiple ways to fit the pieces into the wider frame, allowing you to build your puzzle prowess before tackling the narrow side - which is much trickier! In fact, there's only one correct configuration that fits all T-shapes into the narrower side; you must plan carefully and utilize all of your spatial reasoning prowess.