One of the most important cognitive shifts in the preschool years that occurs between three- to four-year-olds is the development of symbolic thought.
Symbolic thought is the ability to mentally or symbolically represent concrete objects, actions, and event. The most obvious sign of the development of symbolic thought in two- to three-year-olds is the significant increase in the use of miniature form of things around them and take themselves into a world of imagination.
Therefore it is really important for a Pre-School to have a lot of things to attract the attention of their students.
God bless you!