[Snow? Tree houses? Huts? This is the coolest thing ever (pun probably accidental). So when he isn't running along the hanging bridges, inspecting the huts (and delighting in the find of marshmallows) or just outright climbing the trees because why not...
... he's on the ground, building something that looks like-- well. A snowman, except it's clearly not your traditional snowman, comprised of several snowballs stacked up on top of one another, forming... something like a vaguely human shape.]
... huh. I wonder if I should find a branch of a tree to serve as a spear?
[Come ask him what the hell he's trying to do, or run into him as he's busy inspecting everything!]