Last year a lone tooth went for an average $5.36; this year it's $6.23
                                
                                
                                    (Newser) -
                                    Time to pony up, parents—er, we mean, tooth fairies. Last year, a single tooth placed under a child's pillow earned that kid an average $5.36. Inflation has come for even mythical beings, however, with  Axios  reporting that the cost for fallen molars and incisors has shot up...