“Get to Know Your National Parks” on the first and third Wednesdays of every month from January through April with a National Park Ranger from Herbert Hoover National Historic Site. Children of all ages can learn how National Parks preserve America’s natural and historical heritage with a focus on a different national park each time. “Get to Know Your National Parks” meets at 2:00 p.m. in the Library Community Room. The program will last about one hour.