Everybunny has to follow rules.

Taking turns going through the Coke box is important.  It keeps you from getting stuck inside the box at the same time.  Rules work great until...

The little human gives you a tiny Coke box that only River will fit into.  Little humans suck because they don't follow the rules!

I did make it up to Simon by giving him extra noogies and telling him it was an experiment to see if either of them could actually fit through the tiny Coke box.