I visited the Arboretum over graduation weekend, and it's a great thing to spend an hour or so exploring. There's lots of open space to let kids run around, the park is organized beautifully, and trees themselves are quite pleasant.
Also, the sun dial is pretty cool. We guessed at what it was for a while before picking up the guide brochure. That became a game of sorts all on its own.
All-in-all, picturesque, free, and nice detour on busy Penn State weekends.
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