Age specific questions from about 3 years to about 5 years. Younger: toddler. Older: primary-schooler.
This age specific tag covers questions about kids after you start working on school skills with them, but before they start school, so say from about 3 years of age to about 5 years.
A rule of thumb: when they start to develop social skills appropriate for school then you're ready to move up to pre-schooler, until they actually start school that is.