If you or the cuber in your life have solved the 3x3 and want to move on to other puzzles and challenges, the Beginner's Expansion Pack is a great choice! It is a bundle with a beginner-friendly 2x2 and 4x4, as well as vial of light piece lube to help speed up your puzzles -- all at one low price! This bundle contains an MFJS MeiLong 2x2, a YJ RuiSu 4x4, and 3cc of DNM-37.