I agree. DS4 learned to read and write form his toys and maybe from watching Sesame Street. Although he wasn't reading books at 2, he was reading signs and was helping me pick out stuff at the grocery. As for writing, he just picked up a pencil one day. The only thing I helped him with was to show him how to properly hold a pen and some books on cursive writing which he later taught himself at 3-3.5 yo.