Magic Elves

8-yr-old boy's last lesson for the year.  I teach his older sister, too, but she hasn't been able to come to the last few lessons.

Me: So, this is your last lesson for the year.  Would you like a Magic Elf? [like a Freddo frog, but with tingly bits in it - and shaped like an elf, obviously]
Boy [eyes lighting up]: Ooh, yes please!
Me: If I gave you another one, would it make its way to H?
Boy [head to one side, thinking about this seriously]: Ummm... Only if you give me 4.
Me: 4?!
Boy: Yeah... You know how C and I are as well, if I come home with 2 then they'll all want one!

He had a point.  He was the only to get a Magic Elf.