Do a train emote at Talvash del Kissel, and in exchange you'll receive a Gnomeregan Gumdrop!
A trick-or-treater! Huzzah!
Well now, even though you're doing something noble and collecting candies for a child, I can't let you off the hook that easily. I have a yummy Gnomeregan Gumdrop to give to the sick child... if you make a train noise for me! Haha, yes, that'll be the trick! The price of this gumdrop is one train noise!