It might take a little while to drive there, but the trails around the visitor's center at the Hoh Rain Forest is a worthy stop. We did the Olympic loop in late July, 2006 and stopped at the Hoh rain forest to check out the day hikng trails in the area. We walked the Spruce Nature Trail, which is a nice sample of the rain forest. Huge moss covered spruce trees tower over your head. The trunks of these trees had to be 20 feet around or more. There were a few trees that had fallen and the root systems had been torn up and were above ground. When you spot one like this you can catch a glimpse of what these giants look like from below ground. It was interesting to find out that these trees don't have a tap root, and the root system that runs just under the surface is what holds them up. Also along the Spruce Nature Trail you'll cross a few streams and could even see some wildlife. However it's doubtful you would see anything too big since the trail is usually pretty crowded. The trail is paved and is easily accessible by wheelchair, and in my opinion, would a perfect way for children to experience the rain forest. It's not a hard-core hike, but it's a great way to catch a glimpse of the forest if you are short on time. And there are some nice picnic areas near the visitor's center as well. There is a fee to enter, so check with the park before going and make sure you know what to bring. http://www.nps.gov/olym/