2x2

The 2x2 Rubiks Cube is one of the easiest cubes out there. People usually buy it after 3x3 or after 4x4. 2x2 has many methods and usually can be solved with Ortega and 3x3 methods (like CFOP) but changed up a little bit. 2x2 can be challenging for people who can't solve a 3x3.