Regarding my previous question of the Long Night, what i meant was if you think the Children of the Forest knew about the Others before they came in force on the Long Night? I think it’s possible they at least knew they were there, but before the arrival of humans to Westeros, the Others couldn’t create enough wights to attack on the scale of the Long Night, since humans were easier to surprise and kill than individual Children, Giants or wild animals like wolves.

Doesn’t seem like it:

“Before the First Men came all this land that you call Westeros was home to us, yet even in those days we were few. The gods gave us long lives but not great numbers, lest we overrun the world as deer will overrun a wood where there are no wolves to hunt them. That was in the dawn of days, when our sun was rising. Now it sinks, and this is our long dwindling. The giants are almost gone as well, they who were our bane and our brothers. The great lions of the western hills have been slain, the unicorns are all but gone, the mammoths down to a few hundred. The direwolves will outlast us all, but their time will come as well. In the world that men have made, there is no room for them, or us.“ (ADWD)

Leaf is pretty comprehensive in her listing of primordial lifeforms of Westeros there.