Now to put this in perspective for all you fine parents out there who want your children growing up smart and literate, you probably can't get a babysitter for $7/hour any more. And, hoping they actually take to it, my book ought to keep them quiet for a few hours. So, you can call this a very good bargain, yes?
Plus, with The 7 you start planting the seeds of lessons that will develop through the course of the series. And this amounts to a very good thing, unless you have a moral objection to stories with pixies and talking moles and such. In which case, you might look for another way to have your $7 care for your children. I won't be offended. ;)