In general terms the preschool understanding of self is?

In general terms, the preschool understanding of self is concrete and physical. Preschoolers define themselves based on observable characteristics like their appearance ("I have brown hair"), possessions ("I have a red firetruck"), actions ("I can jump high"), and family roles ("I'm a big sister"). Their self-concept is still developing, and they lack a complex understanding of their internal traits or consistent personality across situations. It's largely based on immediate experiences and what they can see and do.