Isaac lost his tooth late one night just two days before Easter and got the tooth ready for the toothfairy. The toothfairy apparently knew that Kaden hadn't seen the tooth due to it being after the kids had been sent to bed (according to Isaac) so she didn't come that night. Well, the toothfairy (bad toothfairy) didn't come the next night (the night before Easter). This was because the Easter bunny is out and about bringing a treat to kids, so the toothfairy has the night off! (again: according to Isaac) So, the day after Easter, the toothfairy FINALLY came and brought Isaac a collectible Gold Dollar!
I guess she thought it better be something good since he had to wait so long!