Rubik's Shells is a set of four intersecting rings containing four different colors of spherical tokens. By default, the rings can be rotated individually, shuffling the tokens at the intersection of the rings. There are also two buttons positioned centrally in the rings that will lock the two stacked ring mechanisms together, disabling individual control over them. Once these buttons are pushed, they lock semi-permanently. Without disassembly, the puzzle becomes permanently more difficult.

Shuffle the pieces, then return them to color-coordinated rings.