Dah! My heart goes out to you! As a father of a little boy myself, I assure you that you have all my sympathies! I'm so dang busy right now with too much real life myself, that I probably won't be able to figure anything out for you, but I will let my brain mull it over in the background and if any great ideas occur to me, I'll be sure to at least make a suggestion.
In the meantime, there's some great talent bouncing around on this board and I bet someone will come through.
Best of luck to you and I hope your boy heals up with the greatest alacrity!