We have entered, no, re-entered, the universe of Harry Potter.
Our dinnertime conversation tonight:
Emma Lucy: Do you know how many sickles are in a galleon?
Isaac (without missing a beat): Seventeen.
Me: How did you know that?
Isaac: Mom! I read it.
Me: And you just remembered it?
Isaac (shrugging): Well, yeah.
Emma Lucy: But do you know how many knuts are in a sickle?
Emma Lucy: And how many knuts in a galleon?
etc., etc., etc.
*Those of you who are true Harry Potter fans will have already caught the error. There are 29 knuts to a sickle. Of course.