You will hear all types of answers for this one! I have a 2 and a half year old little girl, and I began giving her cereal right around the 4 month mark. Everytime we were ready to eat lunch, dinner, she would wake up, and then she would watch as the fork went from plate to mouth, so I took that as a sign that she was ready. I'm not exactly sure when I started giving her juice, but I know it was before one year of age for sure. I diluted the juice down to one ounce of juice and three ounces of water. She loved it, and her digestive system is fine! I've got a baby who will be 4 months old in a week and I will be starting him on cereal pretty soon. I may wait until I go to his four month old check-up and ask the dr. questions of when he think he should start cereal, fruits, veggies, and juice, and go from there, or I may just start him on them anyway. Just go with your instinct, look at what history has taught us, everything baby-related is ALWAYS changing, people used to give babies cow's milk a long time ago, and now they say not to give them whole milk until at least 1 year old, how on earth have children and people survived this long with what the past has been like? Trust your instincts and go with what you think is right! Good luck!