Babies are ready very early to learn what kinds there are. At least some ternary relations such as betweenness are basic. In its numerical use, it reduces to the equality of two fractions, but the quaternary relation seems to be basic in common sense usage. Many of the objects a child encounters, e.g. lemons, belong to natural kinds . The objects of a natural kind have yet undiscovered properties in common.
Animate objects are to be understood in terms of their desires and actions.
Inanimate objects are passive. Some objects are edible by humans and some are not. These kinds pervade the baby's environment. Kinds belong to higher kinds. Red is a color and color is a quality.