Who?
Doesn't light up at the smile of a child?
That magical little smirk that makes you smile back.

Just the movement alone.
Makes you smile more.
When you play with them?

It makes you smile more.

When they and they will play with your lips, face or jaw?
They make you smile more.

So who does light up at the smile of a child?
Tell me who?
Then wonder why not?

When they walk?
Okay, tumble and fall.
Even when they first learn within?
Just how to crawl?