Plus One (age 4): [SHOUTING.] BabyBabyBaby!
T9 (age 2): Huh?
Plus One: [Now whispering.] Say pee-pee! Say pee-pee to Mommy!
T9: Ohh, yeahhh. Peepee. Peepee Mahhhmeee?
Plus One: [Laughing so hard he turns blue, and--let's face it--probably wets himself.] HAHAHAHAHAHAHAHAHAHA!
T9: [Mildly confused, but suddenly amused by his brother's flailing.] Heeheeeee. Peepee Mahhhmeee.
And then, just today at lunch, there was this exchange:
T9: [Sitting at dining room table.] Brah-buh? Brah-buh gone, Mahhmee?
Me: No, he's just going potty, kiddo. He'll be right back.
T9: Oh, yeahhh, potty.
Plus One: [Entering room, hearing his brother, and climbing into his chair.] I was just going potty, Baby. It's for big boys.
Me: Well, you're both old enough for potty now, boys. T9 goes potty, too, Plus One.
T9: Bay-bee! Potty! YAYYYY!
Plus One: [LIGHT BULB. And again, sudden whispering across the table] Baby! Baby!
Plus One: Say toilet! Say toilet to Mommy!
T9: Oh, yeeaahh, toy-ett. Toy-ett, Mahhmeee.
Plus One: [Spitting juice, exploding brain synapses, and falling from chair dramatically.] HAHAHAHAHAHAHAHA!
T9: Heehee. Bru-bah! Bruh-bah faaah down! Hah hah.
Me: IT DOESN'T SOUND LIKE YOU'RE EATING YOUR GREEN BEANS, CHILDREN.