Sarah’s twin sons don’t like vegetables, but she still tries…
Sarah’s twin sons don’t like vegetables, but she still tries to get them to eat some vegetables. Previously, she put the same serving of vegetables on two small plates, with one plate for each of her twin sons. Both of them complains it’s too much. Today, she combined the two servings of vegetable from the two small plates and put them on a big plate and tells them that they each only need to eat half plate of vegetables instead of a full plate as before. Her twin sons agree and are happy they only need to eat half a plate rather than a full plate this time. What developmental stage as described by Piaget can we assume the child is at that moment?