Yellow Branch is a very cool waterfall near Walhalla but VERY busy on the weekend. If you're visiting on the weekend, make sure to get there early to avoid the continuous stream of people.

There are maybe 10-15 parking spots. If your kids are used to hiking, this is definitely kid friendly (I've seen many the few times I've done this trail). The waterfall is also great to cool down in during the hotter months. Please watch your kids at the falls because there are a few places where things could get dicey.