Takács Quartet performance: 4 p.m., Grusin Music Hall, 1020 18th St., Boulder. Celebrating its 50th anniversary, the Grammy-winning Takács Quartet’s dynamic and insightful performances have established the ensemble as a sought-after chamber music group. Its blend of technical brilliance and emotional depth creates an unforgettable musical performance. Experience the quartet that has enchanted Boulder audiences for over three decades and counting. $22-$56, 303-492-8008, cupresents.org.

The Diabetes Link at CU Boulder Fundraising 5K Run/Walk 2025: 9 a.m., Visual Arts Complex, Department of Art & Art History, 1085 18th St., Boulder. Join the CU Boulder Diabetes Link fundraising 5K race to support diabetes research and raise awareness. $15-$30, eventbrite.com.

Watercolor card-making class: 11 a.m., NoBo on the Corner, 4600 Broadway, Boulder. Join artist Patty Phan for a fun and creative afternoon of watercolor card making. This in-person event is perfect for all skill levels and ages. Spend about 30 minutes making a beautiful handcrafted card to impress friends and family. Free, 720-296-8991, eventbrite.com.

Family Play Festival: noon, George Reynolds Branch, 3595 Table Mesa Drive, Boulder. Drop-in and play, sing, read, write, and talk at Spanish and English activity stations. Families with children up to age 5 enjoy educational activities and take-home crafts and prizes as well as new ideas for family fun. Each station will include special activities for babies. calendar.boulderlibrary.org.

Monday Musical Storytime: 10:15 a.m. Monday, Boulder Public Library, 1001 Arapahoe Ave., Boulder. Get ready to dance and sing during this live story time full of songs, musical stories and more. All ages are welcome. Children must be accompanied by an adult. calendar.boulderlibrary.org.

Toddler Explorers: 10:15 a.m. Monday, George Reynolds Branch, 3595 Table Mesa Drive, Boulder. Toddlers explore and learn through hands-on activities that focus on creativity and fun. Imaginations run wild while building foundational skills. calendar.boulderlibrary.org.

Wildlife conservation lecture: 2:30 p.m. Monday, Meadows Branch Library, 4800 Baseline Road, Boulder. The Boulder County Audubon Society presents an Earth Day lecture on wildlife conservation. Learn about local species, conservation challenges and how to help protect the planet’s biodiversity. calendar.boulderlibrary.org.

Boulder County Film Commission happy hour: 5 p.m. Monday, Dairy Arts Center, 2590 Walnut St., Boulder. Join a casual happy hour cohosted by the Boulder County Film Commission and Boulder Chamber member Rob Shearer. Come to network and enjoy the cash bar. Afterward, attend the Classics with Jeffrey Kash screening of Frank Capra’s “Forbidden” at 7 p.m. Tickets for the film sold separately. This is a great opportunity to meet with members of the Boulder film community and share in a mutual love for film. Registration required. Free, eventbrite.com.

Editor’s note: Availability and scheduling of events may be subject to change.