This simple book is about subitising. What is subitising? Subitising is a valuable skill and one that is well worth children learning to master as early as possible. Subitising (or subitizing) is a skill that instantly recognises the number of objects in a small group without needing to count them. Have fun with your child and take turns being the teacher. Watch your child's confidence develop and grow. Praise your child when they are doing well and enjoying the activity.