Conversation in the car

Megan, "Ethan, are you going to buy the Millililum Falcon?"

Ethan, "It's not Millililum Megan, it's Millininum!"

Megan, "Millinilum?"

Ethan, "No, MillININUM!"

Me, "Ethan, do you mean the Millennium Falcon?"

Silence. Followed by several minutes of trying to get the kids to say it right.