Calvins White Square 2 Cube Speed Twisty Puzzle Smooth Calvin Toy Square-2

Top and bottom layers extremely stiff. Pieces pop out frequently and facelets come off.

So hard to twist, you will quickly lose interest. Maybe try one of the black ones. The white plastic seems to be wrong for the purpose with most of these puzzles.

The sides pop off too easily. Doesn't turn efficiently. Hoping to find a better stickerless one soon.