As children hear the numbers they also see the matching number of items, helping them make the link between the number name and the quantity. The activities also have a level where the numbers are not spoken as the items are counted, making them more challenging as children have to do the counting on their own. Tracing the Numberjacks and numbers gives children practice at forming numerals correctly. The app is based on the award-winning educational television series shown on CBeebies and around the world.