Adding and Subtracting Activity Book (Arcturus Maths Skills Workbooks) - Tapa blanda

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Penny Worms is a children's book editor and writer whose book credits include The Gruffalo Child's Sticker Activity Book (Macmillan), My First Creativity Book: Dinosaurs (Carlton), and a number of books for the ever-popular Wallace & Gromit.

A member of the Association of Illustrators and House of Illustration, Kasia Dudziuk has worked on a prestigious list of internationally acclaimed children's brands, such as Barbie, Thomas the Tank Engine, Mr Men and Little Miss and Winnie-the-Pooh. Her clients include Egmont, Usborne, Marks & Spencer and Sainsbury's. She lives in London, England.