bonniebeth:
The doors (factory attached) seem to be designed to only open inwardly. That should help prevent pieces from falling out. I don't know how well this will stand up to actual children! I think your idea about putting everything in the other side is right on the money. In fact, that's what I'll do!
As for the shelf, don't know if it's new, but here are some more pics.
Side one, with closed shelf

Side two, with open shelf

Shelf on side

Hope these help!