The Tooth Fairy is Too Early

Samantha has been talking about the Tooth Fairy this whole day.  She suddenly came up to me and shows me this white pebble-like thing and says it's her tooth and she's waiting for the tooth fairy to come.  I suddenly panicked and looked inside her mouth to check all her teeth.  All her teeth were accounted for, nothing missing there....still what was she holding......could it be really her tooth - I'm no dentist you know, however, she did seem pretty calm for somebody who has just lost a tooth, so anyway for my peace of mind I insisted that she show it me, she refuses and ran inside the room.  I finally got her to tell me what it was......she got it from a pencil eraser.  Right now it's under her pillow and she's expecting a coin in place of her tooth.