Lemons + Tigers

Lucas: There's a kind of tiger called a lemon.
Jill: Oh?
L: Yes, it's a tiger lemon.
J: So is it a tiger, or a lemon?
L: It's called a lemon tiger. There's really a tiger called a lemon tiger. It's plump. Like a lemon.
J: Lucas, you're making this up, there's no such thing!
L: (earnestly) Really mom, there is, there's a kind of tiger called a lemon tiger!
J: (Raises her eyebrows)
L: And there's a lion called a banana lion. Because it's shaped like a banana with a mane.
J: Hey, you're pulling my leg...
(both get the giggles)