My baby babbles a lot! Is this normal? She's just 4 months old and can "talk" for a ten - 15 mins at a stretch, multiple times a day.

Babies tend to emit babbles when they’re in a state where they’re ready to learn new information, they’re aroused, they’re curious. When babies are interested in something, they tend to do a furrowed brow, he continued; parents should understand that babble may be an acoustic version of furrowing one’s brow.