Answer: Schemes
Step-by-step explanation: Piaget was a person to discover the theory of cognitive development in 1936 and he explained about how mental model of the world is constructed by a child. A scheme was defined by Piaget as the collection of the mental representation linked with the world that is what a child uses for the understanding and for responding to different kind of situations as well.
Therefore,the football being kicked or that there are different kind of footballs is seen as scheme according to Piaget.