I went when I was a kid, it was pretty cool. Bridge with a duck pond is what I mostly remember. I have been meaning to take LO there, we live in Tacoma, but I just never seem to remember to go there.
My BFF had her daughter's birthday party at Discovery Pond. It was a lot of fun, but I haven't been back since. IMO, there's plenty to do around here so it's not worth the drive. But if you happen to be in the Tacoma area, definitely check it out.
We go a lot, but it's local for us. :-) There's a great, kid-friendly (not-so stroller friendly though) trail that your boys would enjoy. There are ducks, lots of nature things to see. There's a pond area that is new, a fun play area although better for Ben than Cooper in my opinion. There's a preschool there, so they obviously have lots of options for kiddos. Let me know if you're going to be down this way, we can meet up!
Re: Tacoma nature center?