What could possibly be in that bucket that is more fun than Halo 2, God of War, Jade Empire, Doom 3 or Taiko Drum Master?
I'll bet it's a human head.
They are way too happy for it to be anything else.
That's what happens when you force a child to get out in the sunshine, associate with others of their ilk and be all healthy and stuff. They go and find human heads to play with. Do you really want that? If nothing else, it's unhygienic.