At what age do kids usually start reading?

Depends on what you mean by reading--most kids can write their own name before kindergarten, but that is rote memory. They should know their letters by the end of kindergarten, and should know the accompanying sounds that go with them. Most children can read by the end of first grade (age 6), but the ability level varies drastically. A child who can't read by the end of first grade needs intensive attention and possibly screening for a learning disability if he/she is receiving help already and isn't progressing. Reading daily to your child is essential in building reading skills (read for at least 15 minutes a day).