Bad berries : Urban sims know nothing about wild plants so they may eat bad berries if they aren't careful
Hide and seek : Bushes could become perfect places to hide ... as long as it's not poisoned (itchy skin)
Skip stones : Fishing isn't the only thing to do
Play-fights against a tree
Gather firewood : No more premade campfire in the inventory, the sims have to do it by themselves
Howl at the full moon : Werewolves can do it so humans could do it for fun.
Target practicing : Similar to dart game, throwing knifes on tree
BONUS : Lot Trait for less tourists in Granite Falls, this forest should be away from civilization.