Canton, NY, Jun 01, 2011 — There's a whole subgenre of sport you see people doing at parks to while away a summer day. Hacky sack is a classic. Devil sticks is another. Hula hooping is back.

A newer one uses a rubbery climbing rope strung between two trees. It's called slicklining.

David Sommerstein saw some St. Lawrence University students doing it on campus recently. Here's today's Heard Up North.