Ten Plague Masks

No offense to my Jewish friends but I saw this in the grocery store in the Passover section and was quite amused.  I am guessing they are used for educational purposes during Passover but the thought of someone wanting to be Lice or Boils I found to be rather odd.  And, hopefully no child would want to be Lice or Boils so much that they would dress up like that for Halloween.  There would have to be a lot of explaining to do around that costume.  Also, in what context would a child don such a costume as Lice or Boils?  It doesn't sound like much of a fun party game.