What is this?

Hunter found this under the couch. He said "Look Dad it's a coin".
Daddy: Yes, thats a dime.
Hunter: No, it's a coin.
Daddy: It's also called a dime.
Hunter: No, it's a coin.
Maddie: Na uh, it's money
Daddy: It's a dime.
Hunter: NO! It's a COIN!
Mommy: laughing
Maddie: NOOOOO! It's money.
Daddy: It's a dime.
Mommy: laughing harder
Hunter: IT'S A COIN !!
Maddie: NO! IT'S MONEY!!
Daddy: It's a dime.
Mommy:still laughting
Daddy: Who's turn is it to say our family prayer? I think it's
mommy's turn.
Hunter: IT'S A COIN!!
Maddie: ITS MONEY!
Daddy: It's a dime.
Mommy: Laughing too hard. Must be sleep deprived as tears are rolling down her cheeks.
Hunter: IT'S A COIN!
Maddie: IT'S MONEY! Mommy are you sad?
Daddy: It's a dime. Just say the prayer mommy.
Mommy: No mommy's not sad. It is mommy's bedtime. Mommy can't stop laughing. Daddy you better say it tonight.
Hunter: IT'S A COIN!
Maddie: IT'S MONEY
Daddy: IT'S A DIME. BE QUIET I'M GOING TO SAY THE PRAYER.
Mommy: Still laughing un-controllably