5 free things to do this week in Orange County, Sept. 17-23

Why sit home because you don’t want to spend any money? Here are five things to do this week that cost nothing at all:
SUNDAY, SEPT. 17
Woo woo. Ride the rails of the miniature Goat Hill Junction Railroad on a five-mile track through Costa Mesa’s Fairview Park, 10 a.m. to 3:30 p.m. on the third weekend of each month. Kids must be old enough to walk. Free, but donations and volunteers are welcome. 2525 Placentia Ave., Costa Mesa. ocmetrains.org
TUESDAY, SEPT. 19
If you have a little o