But I have imaginary money!

While in Sam's Club yesterday, Lily asked, as usual, for a hot dog.

Mommy: I'm sorry Lily. We don't have money for a hot dog today.
Lily: But I have money!
Mommy: really?
Lily: Yes. See? It's imaginary money.
Mommy: that's nice honey, but Sam's Club doesn't accept imaginary money.
Lily: But Mr. Sam (meaning Sam Hansen from church) DOES accept real money!