No solids before 6 months and showing all the signs of readiness. I would skip the cereal altogether. It has no nutritional value, it's just a filler. Baby's can teeth at any point. My baby started cooing in the first month.

Three months for my daughter for teething and definitely wait till the doctor okays it for cereal and around two and three months they'll really start cooing.

Yes it did. Lol my son coos very little. Hes 2 months. Hes holding his head up great and my mom told me to go ahead and give him cereal and i said id ask the dr first

I believe they can start teething as early as 3 months, cereal is supposed to be introduced at 4 months if the doctor Okays it (they have to be able to hold up their heads) and my baby started cooing at 2 months.. hope this helped! :)