Pocket Cube
From charlesreid1
My experience solving the 2x2 came from realizing that a 4x4 could be mixed in a way that would yield a second (easier, but not trivial) puzzle: the 2x2 cube.
My experience solving the 2x2 came from realizing that a 4x4 could be mixed in a way that would yield a second (easier, but not trivial) puzzle: the 2x2 cube.