The acquisition of symbolic function is first demonstrated in the preoperational stage.
The Piaget stage that coincides with infancy is the preoperative stage. According to Piaget, this stage occurs between the age of 2 and his age of 7. Preoperative children use symbols to express words, pictures, and ideas, so children at this stage pretend to play.
Piaget found that toddlers start looking for hidden toys around eight months of age. Conclusion: Children around 8 months of age have object permanence because they can form mental representations of objects in their heads.
By the first year, children develop object permanence and can use mental representations to think about objects that do not physically exist. The preoperative developmental period is from 2 to 7 years old. Now they can think with representations in their heads.
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