Three high schools in District 211 are hosting Halloween events for younger children in the Palatine area. This week, Palatine High School, 1111 N. Rohlwing Road, is hosting its 18th annual trick or treat festival from 5 to 6:30 p.m., Thursday. The event is open to chidlren aged 10 and under, and they must be accompanied by an adult. Fremd High School, 1000. S. Quentin Road, is hosting its event next week, from 4:30 to 6 p.m., Tuesday, Oct. 29. The Halloween fest is for children through 6th grade. They must be accompanied by an adult. The third event will be at Hoffman Estates High School, and is for students within the school's boundaries. It will be held Wednesday, October 30 at the school, 1100 W. Higgins Road, from 4:30 to 6 p.m.