Baby Teeth

My sister pointed out to me today that my first boy is losing his baby teeth, just as my third boy is growing his inside his gums.  Yes, Luke has begun to outgrow his baby teeth.  His "bear trap" as my Dad calls it, will become a little more frightening as those adult teeth grow in.  For now we just have an early Jack O' Lantern in our house.  And a curious mother needs to know how much baby teeth are going for these days, because the tooth fairy didn't leave very specific instructions. Anybody know?