If you like Sudoku then try...

Olizoid

Not a baddie from Doctor Who, but rather the brainchild of architect Daniel Oakley. This brainy beauty represents a new wave of 3-D jigsaw puzzles - there are no pictures of kitschy chocolate-box scenes to put together. Instead, you work with gorgeous magnetic blocks of solid colour which fit together in a visually pleasing way.

Designed to look as good as they feel, you can go for the Cool Translucent Puzzle, which comes in acid drop yellows and blues, or the smaller Olistripe Puzzle, in brighter tones. Just remember - they’re not sweets.