Little cries are the cutest sound I hear wherever. From the sound of their voices when they're babbling, to the little steps they are trying to achieve. Looking at the little ones just make my bad day right.
At around 6 months when they learn to chuckle, doesn't it take one worries away? They are a great happiness to many even if you barely know the babies.
The moment the start growing as kids trying to act mature, they make mistakes and cry if they notice. If only they'd be around all the time, I'd want that to happen.