Payomet Performing Arts Center’s Cirque by the Sea Circus Camp returns for its ninth year at 29 Old Dewline Road in Truro. Aerial arts, acrobatics, juggling, trampoline, physical comedy, improv, and rope climbing for children ages 7 to 14. It runs July 5th through August 20th, Mondays, Tuesdays, Thursdays, and Fridays, 9 a.m. to 2:30 p.m. Registration is $380. There is also Nature Ninjas, for children ages 5 to 14, on Wednesdays, July 7th through August 18th, 10 a.m. to noon. Registration is $30 per class at payomet.org.