Did you find something good?
Is that where this water comes from?

The cubs enjoy their water tub.  Bears are excellent swimmers, and they enjoy the water to cool off, get rid of insect pests, and play, just like kids.

Water is very important to bears, and one of the first things mother bears teach their cubs is where and how to find water.  As you can imagine, having a black fur coat can get pretty warm in summer, so they will sit in water to cool off.