I want to see children as pets.
Boy and girl of each race.
We know it's possible with the Argent Squire, who can even mount his own little pony if you get him one.
I imagine children of X race mounting a little gryphon or windrider and following you around while airborn.
We could "adopt" them from the orphanages of each city or something. Maybe as a quest chain or even an extended part of Children's Week. (Because you have to wonder: what is Blizz going to add to Children's Week this year after returning to Azeroth? If anything.)
Dusty would use hers for slave labor, but Windwhistler is really good with kids and would totally teach them how to play rock-paper-scissors.