During the week of the student exchange, Gallus stayed with Sandbar's family. Having been in Equestria for a while already, Gallus didn't think he could learn much more about the way ponies live. He was wrong. Living in a pony household wasn't the same as observing them for sure!
Sandbar's family's kindness touched him deeply. They even threw him a birthday party when they learned no one's ever done that for him before.

Yona in the Dragon Lands: https://www.deviantart.com/queencold/art/Seashell-hunt-861747912
Smolder in Yakyakistan: https://www.deviantart.com/queencold/art/The-foreign-exchange-student-861646064