Oh, TTM!! It's not out of your reach! Get creative. There's gotta be some neice or nephew.....or really young cousin maybe? Any really young brothers or sisters?
You tell the kid's parent you'll ride herd on the little beast while they go shopping. Then when the kid goes into the sewer tunnel you go too......cuz after all.....you daren't let the kid out of your sight. That's your excuse.
Heck. It works for me at McDonald's. Why not you at the mall?