First we got some beach balls:
And then in the other tub we had somewhere between 200 and 230 water balloons (the package originally had 250 but there was some shoddy craftsmanship so a bunch broke). It's not filled, obviously, but that would have taken about 1000 water balloons and that was just not happening.
Then we went and filled his hall closet.
And we had some extra and went back to the laundry room and shoved some more in there!
II realize it's nowhere near as awesome as a jello wrestling pool, or as getting goats and leaving them in his apartment would be (that's a long-standing dream of ours, but the places where you can rent goats around here--and they do exist--only let you rent them for a month at a time, to eat grass and whatnot), but hey, it's hard to come up with ideas.