It doesn't take much to make most pets happy.
Or drop a monkey into the deep end of a bathtub and smile as he swims around and around, truly blissful.
That's the case in the following video, at least, as a monkey named Cosmo finally gains the confidence to go into water beyond his feet's reach, realizing he can stay afloat and then basking in the discovery by diving after treats.
It's adorable stuff. Enjoy it now: