Mouthing.. Is it Normal?? Baby mouthing (aka putting everything into their mouth) is a part of a baby’s learning and development. It also helps their bodies get stronger and better able to keep them healthy.However, in some cases baby mouthing the wrong things can lead to danger for baby or make them sick.Assume your baby will grab at anything they can reach! Keep an eye out for what’s around them and what they might get their little hands on. Teach your baby what’s OK to mouth and what’s not, w