"Baby"

Over the past couple of days Danny has been saying what appears to be "baby". Strange thing is, Inna and I don't really use that word so we think we're hearing things. This morning however, Inna is certain he's saying "baby" as it comes out very clear and he repeats it often. Well, it turns out that all the other kids at daycare (all quite older than Danny) call him "baby" in their interactions with him. So maybe "baby" is what he's saying after all?