Kids today see Sudoku as the king of all puzzles, but we say "Not a bit of it!" NOTHING compares to the little cube of frustration that turned up in the stocking of everyone over the age of 24. Nothing can quite rival the feeling of successfully completing the Rubik's Cube (so we're told - having never completed one we'll just have to dream) and now you can keep one in your pocket at all times, without having to explain the huge lump in your trousers. The Rubik's Cube Keyring is exactly that - a Rubik's Cube that will clip onto your keys. Forget Sudoku, there's no satisfaction in writing endless grids of numbers and, if we're honest, how does anyone know if they're doing it properly? What you need is a 3 x 3 x 3 cube with 6 colours so you can clearly see your goal - not that it will make it any easier.