Introducing solid foods.

Dana
Ok moms I have a question, how old was your little one when you started introducing solid foods? My son is almost4 months can eat 6-8oz at a time and sometimes still seems hungry after, he watches me eat and has been grabbing at my food and the other day tried to put it in his mouth, online I read 4-6months but my doctor said they can't have it until 6-9 months. Has anyone started around 4 months????