Criss-cross puzzles are a unique and inventive to improve your maths skills. Simply fill out the missing numbers in the grids to complete the multiplication sums.This vibrantly illustrated, ingeniously designed book transforms maths practice into a game that young readers will love. As they solve the puzzles, kids will be boosting the speed at which they can solve simple problems, and supercharging their mental maths ability.The book also contains a fun fact on every page, linked to the vibrant illustrations. For bright sparks aged 5+.