We had a playdate with one of my closest friends who has a daughter the same age as Madeline as well as a 6-month-old little boy.
Out of the blue, Madeline proudly lifted her dress and showed Ava, her playmate, her big-girl underpants. "I'm potty trained," she announced. (No need to mention the fact that she pooped on the carpet earlier this week.)
Ava eyed Madeline's Little Mermaid undies. "Nice panties," she said.