The four “spraygrounds” — play areas for children where water shoots up out of the ground — will open for the summer this weekend, in time for Memorial Day.

The facilities are located at Drew Park (3500 23rd Street S.), Virginia Highlands Park (1600 S. Hayes Street), Lyon Village Park (1800 N. Highland Street) and Hayes Park (1516 N. Lincoln Street).

The spraygrounds will be open most days between this weekend and Labor Day. You can see the schedule, which may vary on holidays, for each individual park at the county Parks and Recreation website.

Arlington’s Department of Parks and Recreation has ground rules for using the spraygrounds, including asking users to “interact with the spray ONLY if free of diarrhea for the past two weeks,” and “diaper-age children or incontinent persons must wear a ‘swim diaper.’”

Photo via Parks and Recreation