FIRST COLOURING BOOK: NUMBERS 1-20 start your child’s colouring adventure with the mind to mind colouring book series. every child will enjoy the experience of colouring these lovely pictures. the large and thick outlined pictures in these books are excellent guides to train the young minds to colour within a given space. you may grade your child’s ability using our grading code. present your child with all 4 books in this series.