Children apparently were involved in a playground fire that caused at least $30,000 in damage Tuesday night at a Spanish Fork elementary school. The fire broke out about 6 p.m. at Park Elementary School, 90 N. 600 East, in a playground structure, said Nebo School District spokeswoman Lana Hiskey. High winds caused the flames to spread, damaging another nearby playground structure and burning an exterior wall of the school and a small part of the roof, Hiskey said.