That baby has a full happiness meter and has no trouble accessing joy.
See we all start our life on planet earth with the capacity to be happy.
Before we have houses, careers, cars, or even an allowance, we already come equipped for being happy.
The ability to feel happiness exists within us.
But as life progresses we forget how to access this pure joy.
Here’s a quote from Leo Tolstoy: “If you want to be happy, be.”
It's really is that simple.
Just existing provides an opportunity to have happiness.