Three hours at Walmart for new tires yielded a few trips to the bathroom. (What else are you going to do when you don't actually need to do any shopping?)
Every time -
E: Yay, Mommy. Good job. (little hands clapping)
Leaving the bathroom:
E: Mommy, go potty like big girl! Good job. Yay! (more hand clapping.)
Thanks, kid. Now, just in case there was ever any doubt, everyone in Walmart knows I just went to the bathroom.