Today-Sunday. Explore the world with Elmo and friends in “1-2-3 Imagine!”, the latest Sesame Street Live production. Running at the 1stBank Center through Sunday, the musical adventure shows how imagination can take you anywhere and let you be anything. All sorts of Sesame friends are featured: Elmo takes a trip to Africa, Ernie becomes a sea captain, Bert dreams up an octopus pal and more. 10:30 a.m. and 7 p.m. today; 10:30 a.m., 2 p.m. and 5:30 p.m. Saturday; 1 p.m. and 4:30 p.m. Sunday. 1stBank Center, 11450 Broomfield Lane; 303-410-0700, ext. 301. Tickets are $15-$35. Buy tickets at tickethorse.com or call 866-461-6556. Learn more at sesamestreetlive.com.

Sunday. Learn all about opera — and give singing a try yourself — at “Abra-Kid-Opera: A Magical Afternoon,” presented by the Central City Opera House Association Guild. Geared toward kids ages 5 to 12, the afternoon starts with “The Great Opera Mix-Up,” a short show featuring members of the Central City Opera Ensemble and lots of help from the kids. The program also includes magician Greg Tobo and vocal exercises with Emily Crile of the Colorado Children’s Chorale. 1-3 p.m. Sunday. Pinehurst Country Club, 6255 W. Quincy Ave.; 303-985-1551. Admission is $10 per person and includes a snack; all children must be accompanied by an adult. For more information, visit centralcityopera.org.

Saturday. Spring winds are blowing, which means it must be time for the 8th annual Arvada Kite Festival. Bring your own kite to compete in one of the age-grouped competitions; prizes will be awarded for the highest, smallest, largest and most visually appealing kites. Don’t have a kite? No problem — kids can make a small one for free, or buy one. Take a break from the high-flying fun with live music, jumping castles, face painting, art activities, snacks and more. 10 a.m. to 4 p.m. Saturday. Robby Ferrufino Park, West 74th Avenue and Carr Drive, Arvada. Admission is free. For more information, call 720-898-7400 or visit arvadafestivals.com.

Saturday. The insect world is a weird and wonderful place. See some of its strange marvels at “Dr. Entomo’s Palace of Exotic Wonders,” the new exhibit at the Butterfly Pavilion. Designed like a circus sideshow, the exhibit confronts the facts and fiction about all kinds of arthropods — animals with exoskeletons and segmented bodies. Animals on display include hissing cockroaches, scorpions, tarantulas, giant mealworms and the acid-spitting vinegaroon. For added shock value, stop by one of chef David George Gordon’s insect cooking demonstrations, at 10 a.m., noon and 2 p.m. Saturday. 9 a.m. to 5 p.m. daily through August 22. 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. Visit butterflies.org for more information.

Saturday-Sunday. The sensation known as sport stacking takes over Magness Arena this weekend at the 8th annual World Sport Stacking Championships. Nearly 700 stackers of all ages, from 18 countries, will bring their speedy skills to the contest, competing in individual and relay categories. What’s speed stacking? Competitors stack cups in a variety of sequences — whoever does it the fastest and wins. It’s simple enough, but it’s not as easy as it sounds. Try it out on Saturday at the competition’s StackFest, where anyone can give stacking a shot. 8 a.m. to 3 p.m. Saturday and Sunday. Magness Arena, 2201 E. Asbury Ave. on the University of Denver campus; 303-871-2336. Admission is $10 for adults, $7 for kids ages 5 to 17. Children age 4 and younger are free. For more information, visit worldsportstackingassociation.org.

-Kathleen St. John