What to do and where to go in December

Special events
Imagination Playground: The Imagination Playground will return to Pretend City, and kids will be able to build a new world every day. Objects like animals, rocket ships and robots become a reality. This child-directed area is open-ended and encourages self-expression through deep, joyful play. $9.50-$12.50. 10 a.m.-5 p.m. Dec. 1. pretendcity.org
Wilderness Access Day at Limestone Canyon: Designated trails will be open for self-guided trail use in OC Parks’ Irvine Ranch Open