"Yes, that's totally normal! They do get into a stage where they produce a lot more saliva and they don't swallow it at the rate adults would- some people see this as a sign of teething, but it is just a normal stage for little ones…"
Sometimes babies will roll over around three months, but not always. Some of mine were earlier then that, and others later. Mostly at three months, you want to make sure they can support their own head, and can do kinda like…"