The bird kind

Kevin and I played Rush Hour, Jr. before dinner and we are missing one of the cars so I substituted a different one of the same size in its place. Kevin said, "Yeah, you just need another 'two-bee' to use instead. Haha, 'two-bee,' 'blue-bee,' 'boo-bee.' You need boobies!" I wasn't sure if he's heard that word used at school before so I just kept my mouth shut to see how he reacted. After my pause he said, "You know, boobies!" I said, "Like Blue-footed Boobies?" He said, "Yeah, like those." Nary a giggle from the kid. Still safe, for now.