1. Sherman Library & Gardens and the Orange County Chrysanthemum Society are hosting a Chrysanthemum Show from 1 to 4 p.m. Saturday and 10 a.m. to 4 p.m. Sunday. Hundreds of mums will be on display for a panel of national judges, and single-stem and container mums will be available for purchase. Sherman Library & Gardens is located at 2647 East Coast Highway.
2. Want to introduce your kids to opera? The Newport Beach Public Library will host a free Family Concert at 11 a.m. Saturday called “Adventures in Song and Story.” The concert features members of the Southland Opera and will use familiar stories and fairytales like Hansel and Gretel and “The Sound of Music” to instill a love of music. The concert is free and first-come, first served. Children must be accompanied by an adult. The concert will take place in the Friends Room of the Central Library at 1000 Avocado Ave. For more information call (949) 717-3860.
3. Head to Crystal Cove State Park for a free, guided family hike at 9 a.m. Sunday; meet at the amphitheater by the Moro day-use lot.
4. Lincoln Elementary School’s PTA is holding its first-ever fundraising rummage sale from 9 a.m. to 1 p.m. Saturday at the school at 3101 Pacific View Drive.
5. St. Mark Community Preschool will host its fifth annual Country Fair from noon to 3 p.m. Sunday, with refreshments, games, a silent auction and more. Admission is $10 for kids and $15 for adults. The preschool is located at 2200 San Joaquin Hills Road.