A child first describes an apple by colour, later groups it as 'fruit'. Development goes:

1. Preschoolers first describe objects by a concrete property such as colour. 2. Later they relate objects through a higher, more complex idea, a class called fruit. 3. So development proceeds from the simple, concrete to the more complex. _Source: Virginia Cooperative Extension Publication 350-053, Human Growth and Development: A Matter of Principles (Ruffin), "Principles of Development"_