He's soon laughing as well (but don't make him admit that), throwing snow at River and scrambling to not fall over as she returns the favor. As soon as he's out of a good handful, Kas backs off and hurries to find cover behind another snowbank.

"I'll get you!" He calls out, starting to build himself an arsenal of snowballs that he could lob over at her and the other kids.

This was a real relief, honestly. It reminded him of some less painful winter days on the streets, he and a few other urchins having a bit of fun to warm up.