Saturday. It’s a smorgasbord of all things kiddie at the 9th annual Colorado Baby and Kidz Expo. The vendor booths are for the grownups (mostly), but the rest of the expo is a fun-fest for youngsters. Decorate cupcakes, join a foam-sword battle, meet animals in the petting zoo, go bowling or ride a mini-train—the expo is your oyster. Live performances will run throughout the event, including a magic show, science experiments and martial arts demonstrations. Fans of Dora the Explorer should be prepared for a photo op: The Disney cartoon star will be stopping by for a visit. 10 a.m. to 6 p.m. Saturday. National Western Complex, 4655 Humboldt St. Admission is $10 for adults, $5 for seniors age 65 and older. Kids age 12 and younger are free. theexpopros.com/denver

Saturday. Get groovy with the Butterfly Pavilion at “BugaRhythm.” Presented in collaboration with Radio Disney, the day-long event features lots of rockin’ tunes and funky invertebrates. Learn more about the Pavilion’s creatures-in-residence, including bees and, of course, butterflies. Jam out to performances throughout the day from the Que Pastas, Ballet Nouveau Colorado and Dual Star Academy of Dance. Radio Disney will provide fun and games, too, like the Millipede Limbo, Pass the Potato Bug and a “Beetle Mania” dance party. 10 a.m. to 5 p.m. Saturday; last entry at 4:15 p.m. The Butterfly Pavilion, 6252 W. 104th Ave., Westminster; 303-469-5441. Admission is $8.50 for adults, $6.50 for seniors age 65 and older, $5.50 for children ages 2 to 12. Adult Westminster residents receive a $2 discount. butterflies.org

Saturday. Future scientists and their families can cozy up with a free movie at the University of Colorado Museum of Natural History. “Small Things Considered” presents the film “Microcosmos,” a 1996 documentary that explores the wee world of insects living in ponds and meadows. The museum will have specimens of the movie animals available for closer examination, too. Don’t worry about bringing a snack—popcorn will be on-hand and ready to crunch. 1-4 p.m. Saturday. CU Museum of Natural History, Henderson Building, 15th Street and Broadway, Boulder; 303-492-6892. Admission is free. cumuseum.colorado.edu

Sunday. The Buffalo Bill Museum and Grave throws a rootin’-tootin’ birthday hoedown for its namesake. The party starts with a “Happy Birthday” singalong led by an ensemble of Buffalo Bill lookalikes, plus free cake and ice cream. Then it’s time for games, including buffalo-chip throwing and a Buffalo Bill and Annie Oakley costume contest. The birthday celebration also marks the first days of the museum’s new exhibit, “Buffalo Bill Superhero.” Using a collection of old “dime novels” as a backdrop, the exhibit draws parallels between modern-day comic book superheroes and Buffalo Bill’s real life personality and adventures. Noon to 3 p.m. Sunday. Buffalo Bill Museum and Grave, 987-1/2 Lookout Mountain Road, Golden; 303-526-0747. Admission is free. buffalobill.org

Saturday. Kids can enjoy a bit of lunchtime theater when the Adams Mystery Playhouse presents “Mystery of the Wizard’s Wand.” Families are invited to bring along a sack lunch and settle in for the tale of Shazam, a benevolent wizard whose wand suddenly goes missing. The interactive show lets the audience sort out the clues, identify the culprit and help Shazam find the stolen wand. Costumes are encouraged, in the spirit of magic-making. 11 a.m. to 1 p.m. Adams Mystery Playhouse, 2406 Federal Blvd.; 303-455-1848. Tickets are $10 each. Buy advance tickets online at adamsmysteryplayhouse.com.

Kathleen St. John