A weekend calendar of events for families.

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Today

Pet Day at the Holiday Carousel

Humane Society of Seattle/King County hosts pet-friendly Santa with drawings for pet-related prizes, pet-food-donation drive, dogs available for adoption and information about pets, 10 a.m.-4 p.m., Westlake Park, 401 Pine St., Seattle (425-641-0080).

Orienteering at the UW campus

Cascade Orienteering Club event to explore the campus for checkpoints marked on a map, race against the clock or on a leisurely stroll, no experience necessary, instruction on request, start any time 10 a.m.-noon, University of Washington, University of Washington, Seattle; $5-$10 (www.cascadeoc.org).

Presents to the Park

Everyone invited to help plant trees and shrubs to give wildlife new homes, 10 a.m.-1 p.m., Discovery Park, 3801 W. Government Way, Seattle; call morning of the event to register (206-386-4236).

Meridian Park School Sports Card and Collectible Show

Show and sale featuring vintage baseball, basketball and football cards; cards of modern players; autographed cards; comics; Magic cards; toys and other collectibles; Magic tournament with prizes for kids, 10 a.m.-4 p.m., Meridian Park Elementary School, 17077 Meridian Ave. N., Shoreline; free admission (206-533-2009).

Shoreline Historical Museum Holiday Hands-On Day

Greet the Shoreline firefighters and their firetruck and meet Santa, both arriving at 11 a.m.; Santa will stay until noon, passing out “olde tyme” gifts and visiting with children; activities include making a traditional folded box to take home and making ornaments to decorate the museum tree, 11 a.m.-3 p.m., Shoreline Historical Museum, 749 N. 175th St., Shoreline; free (206-542-7111).

Today, Sunday

Holidays at MOHAI

Featuring a display of dozens of Rockwell Saturday Evening Post holiday-cover illustrations through Jan. 15, 10 a.m.-5 p.m. daily; Home for the Holidays family activities, crafts, today and Sunday, including performance by the Dickens Carolers and holiday stories with Mrs. Claus, 11 a.m.-1 p.m. Saturday, include with museum admission, $5-$7; MOHAI Radio Theater golden-age-of-radio drama, 7 p.m. Saturday, $10-$15; Museum of History & Industry, 2700 24th Ave. E., Seattle (206-324-1126).

Sunday

Santa at the Future of Flight

Santa arrives by air with holiday events and free admission all day for museum and Boeing tour, 8:30 a.m.-5:30 p.m., Future of Flight Museum, 8415 Paine Field Boulevard, Mukilteo; free (888-467-4777).

Ongoing

Winterfest

Holiday décor, entertainment, train display, ice rink, 10 a.m.-7 p.m. daily, hours may vary with special events, Center House; carousel, 11 a.m.-6 p.m. Monday-Friday, 11 a.m.-9 p.m. Saturday and Sunday, Fisher Pavilion, $1; Seattle Center, Seattle (206-684-7200 ).

Festivals of Light

Traditional decorations, music, dance, storytelling and art from cultures around the world: celebrating Philippine Christmas, today-Dec. 22, Festival of Santa Lucia, Dec. 23-31, 10 a.m.-5 p.m. Monday-Friday, 10 a.m.-6 p.m. Saturday and Sunday, The Children’s Museum, Seattle Center House, Seattle; $6.50-$7.50 (206-441-1768 or www.thechildrensmuseum.org).

Bellevue Magic Season

Snowflake Lane nightly light show with falling snow, live toy soldiers, carolers, music and light show, ice rink, 7 p.m. daily through Dec. 24 and Dec. 26-31, along the sidewalks of Bellevue Way and Northeast Eighth Street, Bellevue (425-453-1223 or www.magicseason.com).