Ketchup...again

Dad: Do you want mayo or mustard on your roast beef sandwich?
Eva: Neither. I want ketchup.
Dad: You don't put ketchup on roast beef.
Eva: I do.

Belly dancer

Eva: The baby is crawling onto the table like a belly dancer.
Mom: Belly dancer?
Eva: Yeah, belly dancers crawl on tables at the pub.
Tom: You mean a lap dancer!

Live long and prosper

While watching Star Trek.

Eva: Oh no, that elf just died.
Dad: It's a Vulcan Eva, not an elf.

Bud taste

Eva: This food is on my bud taste.
Mom: Taste buds Eva.

1958

Eva is drawing a diagram and instructions for a time machine.

Eva: Dad, the time machine doesn't go back earlier than 1958.

Dad: Why not?

Eva: So you don't get eaten by dinosaurs.