Riddles, brain puzzles and mathematical problems

[DavidS]

Does learning how to solve a Rubik`s Cube still count as a brain puzzle or is it widely regarded as the "easy mode" in these parts? In any case, it is funny how hooked you can get on these little 3D puzzles. Once I got the 3x3x3 down, should I either try a bigger one or better play around with another of Rubiks contraptions?