Mrs. Weston asks her 8-year-old son, Colin, if he wants his sandwich in one piece, or cut into two pieces. Colin asks her to keep it in one piece, because he isn't hungry enough to eat two pieces. In the context of Piaget's theory of cognitive development, Colin's answer suggests that he:

Does not yet understand conservation.

Explanation:

From Piaget's theory of conservative development so far, it explains different ages in children and their different forms of development types. Which includes different learning roles to help them develop the more.

He(Piaget) believed that children take an active role in the learning process, acting much like little scientists as they perform experiments, make observations, and learn about the world.

As kids interact with the world around them, they continually add new knowledge, build upon existing knowledge, and adapt previously held ideas to accommodate new information.

a factory opens that mass-produces light bulbs.

explanation:

not sure if that's an answer to your questions but this is an example! : )