While I've only been inside the nature center once, it was a neat experience. Lots of things to checkout and explore especially if you're a little kid. Make sure you check out the Cleveland Metroparks website for a calendar listing of their fun (and educational) events!
Now I have been in the surrounding park half a dozen times and I must say that I really enjoy the area! Visiting in the fall offers some gorgeous views of the trees with their colorful leaves. You could get in a good workout by climbing up and down the front stairs that have been newly renovated. 155 steps! Maybe you'll catch a beaver floating in the water, deer frolicking about, or hear a dozen different bird calls. Or you can do like I did this past Sunday and join a guided hike where we took in the sunrise.The hike was from 6-7am and our guide was Lindsay who was pleasant and knowledgeable. I'm looking forward to their upcoming full moon hike!
While this is a lovely area, just remember it's popular and thus can get pretty busy! I know when I left at 8am the other day the parking lot was almost full and the sound of people talking drowned out the peacefulness, but getting lost on a trail should bring back the serenity. Also please keep your dogs on a leash or at least be mindful of them, I had one overly friendly big dog named Leo unexpectedly jump on me (not everyone is a dog person, I know I know bring on the hate mail).