[He grins, happy to see Joaquin so carefree for once. The last couple of months have been hard on him. He tries and fails to juggle a bit.]

It's kind of a kids thing. You're supposed to jump in it, or swim in it, or something. It's for fun! There used to be whole jungle-gyms with slides and nets and other stuff to climb or crawl through, and these were usually at the end of the slide, so you splashed down into the ball pit.