Addendum

Asher:  ...but there's not a real leprechaun in dis world.  Dat's not a real thing in the world!
Owen:  Asher, yes there is!  Miss Kathy, my 4 year old preschool teacher told me about leprechauns.  MO-OM....are leprechauns real?
Me:  Um, well, I'm not totally sure, but I'm thinking probably not.
Owen:  You are not right!  That is wrong.  Miss Kathy told us all about them and she said that she SAW ONE!!!  They are real.

(Asher may be wise for his years because his preschool teacher asked me to help prepare him for their St. Patrick's Day class activity by letting him in on the fact that leprechauns aren't real and they are just pretending in class.  Apparently when they've played pretend games of a shark or bear chasing the kids, Asher takes it very seriously and gets terrified!  So she was worried about fear of leprechauns!  I hadn't filled him in yet, but his teacher must have already talked to him, I'm guessing.  Maybe all this leprechaun business is big around here because of how Irish our town is historically???  Too funny.)