Answer:
The answer is preoperational stage.
Step-by-step explanation:
This the second stage in Piaget's structure of cognitive development. In this stage, children begin to manipulate symbols (they might pretend a remote control is a microphone). It's also characterised for the apparition of language.
During the preoperational stage, children cannot use concrete logic. In the example, Joe cannot yet compare the concepts of colour and shape mentally.