Robotics - Maths Games and Puzzles by Anna Nilsen provides a kaleidoscopic collection of simple and challenging mind-benders. Weaved into a dozen psychedelic picture puzzles are addition, subtraction, multiplication, division and fractions. Numbers are symbolised by a colour-coding scheme displayed on gatefold flaps that open out from the cover; examples of how to decipher problems along with practical hints also feature on the flaps. However, children will find it hard to interact with it because of the proliferation of pixels. The colours steal the show, not the maths. It costs pound;4.99 from Little Hare Books.

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