In a wonderful celebration of Mother's Day, the hilarious crayons love their mums -- and the mother figures in their lives -- so much, that they wrote a book about it! Red crayon loves his mum because she works extra hard, especially during the holidays. Yellow and Orange crayons love their grandma, who has a been like a mum to them. And White crayon loves his mum very much, even if he can't always see her. In this inclusive celebration of all kinds of families, the crayons show how much they love celebrating their mums -- and other family members -- on Mother's Day.