Little Nine introduces the concept of "nine" by interacting with nine of a variety of things which group and regroup to demonstrate principles of adding and subtracting.

Little seven introduces the concept of "seven" by interacting with seven of a variety of things, some of which are grouped and regrouped to demonstrate adding and subtracting.

Little ten plays with her ten robot dolls and manipulates other toys and items for the reader to see what numbers can be put together to make ten.

Little Two introduces the concept of "two" by interacting with two of a variety of things.