Austin Area Train Show. See more than 16,000 square feet of model trains. 10 a.m. to 3 p.m. Sunday. $7, kids free with adult. Williamson County Expo Center, 5350 Bill Pickett Trail, Taylor. austinrailway.org
Start-Up Kids Market. See what young entrepreneurs have figured out. 1 p.m. Sunday. Republic Square Station. 244 Guadalupe St.
Parents' Night Out. The kids swim and play while the parents really play. 6:30 p.m. Friday. $50. Tom's Dive and Swim, 5909 Burnet Road. tomsscuba.com
Lemonade Day. Set up your own lemonade stand Saturday and learn how to run a business. lemonadeday.org/austin
PopCats. It's cats-meet-pop-meets-art festival. 11 a.m. to 5 p.m. Sunday. $10-$30. Palmer Events Center, 900 Barton Springs Road. popcats.org
Touch-a-Truck. SAFE Austin's fundraiser lets kids touch and explore a fire truck, school bus, bulldozers and more. Plus train rides, games, a food truck and games. $5 kids, $10 adults. 10 a.m. to 3 p.m. Saturday. Camp Mabry. safeaustin.org/touchatruck
Bullock Museum. H-E-B Free First Sunday: Colorful. Noon to 4 p.m. Sunday. "Little Texans: Tools." 10 a.m. Thursday. Bullock Museum, 1800 Congress Ave. thestoryoftexas.com
Williamson Museum. Kidz Korner. 10 a.m. to 5 p.m. Saturday, Georgetown location. Free. Pioneer Times. History comes alive with kids activities. 10 a.m. to 3 p.m. Saturday. Chisholm Trail location. Williamson Museum, 716 Austin Ave., Georgetown, and 8 Chisholm Trail, Round Rock. williamsonmuseum.org
Lady Bird Johnson Wildflower Center. Native Plants to Dye For. Learn how to use plants to dye fabric. 10 a.m. to 1 p.m. Sunday. $45. Writing From a Bug's-eye View, creative writing class for kids in second through fourth grade. 10 a.m. Sunday. $10. Sprouts preschool program 10 a.m. Wednesdays and Thursdays. Lady Bird Johnson Wildflower Center, 4801 La Crosse Ave. wildflower.org
Science Mill. Be a Coder Homeschool Day. 10 a.m. to 2 p.m. Thursday. Science Mill, 101 S. Lady Bird Lane, Johnson City. sciencemill.org
Contemporary Austin. Community Grand Opening: The New Moody Pavilions at Laguna Gloria and Second Saturdays Are for Families: Recycled Robots. Explore the new pavilion and make recycled robots. Free. 11 a.m. to 3 p.m. Saturday. Contemporary Austin Laguna Gloria, 3809 W. 35th St. thecontemporaryaustin.org
Thinkery. Baby Bloomers. Kids up to age 3 talk about the sky in May. 9 a.m. Saturdays and Mondays. $5. Art Start. 9:45 a.m., 10:45 a.m. and 11:45 a.m. Wednesday through May 15. $18. Tinkering Tots. 9:45 a.m., 10:45 a.m. and 11:45 a.m. Friday through May 17. $18. Think Lab: World of Wildflowers. For ages 4 and up. 10:30 a.m., noon and 1:30 p.m. Sunday. $8. Tinkering Take Homes: Wood Burning Art. 10 a.m. to 1 p.m. Saturday. $6. Thinkery, 1830 Simond Ave. thinkeryaustin.org
Toybrary Austin. Bubbles Bigger Than You Can Believe. 10:30 a.m. Tuesday. $12. Salt painting. 10:30 a.m. Friday. $7. Daddy & Me Playdate: Spiderman. 10:30 a.m. Saturday. $12. The Other Other Brother. 5:30 p.m. Saturday. $12.Baby Play Group. Tuesdays 1-3 p.m. Date Night Child Care. 5 p.m. Saturdays. $25. Music Classes with Miss Ariel. 10:30 a.m. Wednesdays. $10. Gardening Classes. 10:30 a.m. Thursdays. $7. 2001 Justin Lane. toybraryaustin.com
Austin Playhouse's "Summer and Bird." Katherine Catmull adapts this middle-grade novel. After their parents go missing, sisters Summer and Bird get transported to a magical bird world. $7-$28, kids 4-18 free. Austin Playhouse, 6001 Airport Blvd. 7:30 p.m.Friday- Saturday, and 2 p.m. Sunday, Saturday. austinplayhouse.com
Pollyanna Theatre Company presents "Acorn and Robin." This theater for the very young show features friends exploring the forest with five senses and finding a new egg. 9:30 a.m. and 11 a.m. Thursdays through Saturdays, Thursday-Saturday. Carver Cultural Center's Dance Studio, 1165 Angelina St. $7.50. pollyannatheatrecompany.org
"Roald Dahl's Matilda the Musical." The book about a little girl standing up against her parents and headmaster. 7:30 p.m. Wednesday-Saturday. 2:30 p.m. Sundays Through May 12. $30-$93. Zach Theatre's Topfer, 202 S. Lamar Blvd. zachtheatre.org
Darci Lynne & Friends. Twelve-year-old singer, ventriloquist from "America's Got Talent." 3 p.m. Sunday. $29.75-$49.75. Bass Concert Hall, 2350 Robert Dedman Drive. texasperformingarts.org
Disney on Ice: "Frozen." 7:30 p.m. Wednesday-Friday, 11 a.m., 3 p.m. and 7 p.m. Saturday. and 1 p.m. and 5 p.m. May 12. $15-$60. H-E-B Center, 2100 Avenue of the Stars, Cedar Park. hebcenter.com
"Hideout Kids Presents: Trash Critters." You help create the show. 11 a.m. Sundays. $5. Hideout Theatre, 617 Congress Ave. hideouttheatre.com
Mobile Loaves and Fishes Community First Village free screenings."Fantastic Beasts: The Crimes of Grindelwald." 7:30 p.m. Friday. Mobile Loaves & Fishes Community First Village, 9301 Hog Eye Road. mlf.org
Alamo Drafthouse. "Pokemon: Detective Pikachu" Family Party. 9:45 a.m. Saturday, Slaughter Lane. PBS Kids, "The Daniel Tiger Movie." 9 a.m. Sunday, Mueller.
BookPeople. Events: Kate Williams & Michelle Campbell read "Let's Go on Safari." 2 p.m. Sunday. Noemie Levy, Elle Celeste, Taylor Lustig, Molly Dillon and Jamie Woo read "Yes She Can!" 7 p.m. Monday. Carmen Oliver and Debbie Gonzalez read "A Voice for the Spirit Bears" and "Girls With Guts." 2 p.m. Saturday.10:30 a.m. storytimes Tuesday, Wednesday and Saturday. Llama Destroys, Tuesday. Ms. Staci, Wednesday. Ramadan, Saturday. BookPeople, 603 N. Lamar Blvd. bookpeople.com
Barnes & Noble. 11 a.m. Saturday storytimes: "In a Minute, Mama Bear." Saturday. barnesandnoble.com
Homeschool D&D Club. 10 a.m. Wednesdays, Central Library.
Dance a Story: "Giselle" for ages 3-5. 1 p.m. Wednesday. Central Library.
Early Literacy Playgroup. 11 a.m. Tuesday, Milwood Branch. 11 a.m. Thursday, Southeast Branch.
Crafternoon. 3 p.m Wednesdays, Ruiz Branch. 3 p.m. Mondays, Southeast Branch. 3:30 p.m. Thursday, Twin Oaks Branch.
Lego Lab. 4:30 p.m. Monday, Carver Branch. 3:30 p.m. Thursday, Willie Mae Kirk Branch. 3:30 p.m. Friday, Manchaca Road Branch. 4 p.m. Friday, North Village Branch.
Bow Wow Reading with Quintana Roo. 4:30 p.m. Wednesdays, Little Walnut Creek Branch. With Wrangler the Dog. 4 p.m. Friday, Milwood Branch.
Just for Teens: Science & Math Tutoring. 2 p.m. Sunday, Central Library.
Happy Mail Art with Rita Wang. For kids 8 and up. 3 p.m. Sunday, North Village Branch.
Science Fun! Robots Unplugged. 3:30 p.m. Tuesday, Pleasant Hill Branch.
ACCIO: Rubik's Cubing Club. For ages 8-18. 4 p.m. Tuesday, Central Library.
Family Board Game Night. 5:30 p.m. Tuesdays, Central Library.
Asian Pacific American Heritage Month: Celebrating with crafts and history. 6:30 p.m. Tuesday, Milwood Branch. Asian Food Crafts. 7 p.m. Thursday, St. John Branch.
College Planning Workshop: College Admission 101. 6:30 p.m. Tuesday, St. John Branch.
STEM Builder Lab. 3:30 p.m. Wednesday, Spicewood Springs Branch.
Tween and Teen Anime Club. 3:30 p.m. Wednesday. Ruiz Branch. 3:30 p.m. May 24, Twin Oaks Branch.
Just for Teens: Escape Room Design Club. 6 p.m. Wednesday, Central Library.
NBTween Graphic Novel Book Club. 4:30 p.m. Wednesday, St. John Branch.
Thursday Matinee: "Jumanji." 1 p.m. Thursday, Terrazas Branch.
Music and Movement. 11 a.m. Friday, Old Quarry Branch.
Perler Lab. 3 p.m Friday, St. John Branch.
Animanga Club, 3:30 p.m. Friday, Carver Branch.
NBTween Book Club: "The Baby-sitters Club." 4 p.m. Friday, Windsor Road Branch.
Unicorn University Stencils and Wooden Signs. Noon Saturday, Twin Oaks Branch.
Family Cooking Class, 12:30 p.m. Saturday, Carver branch.
Saturday Cinema: "Incredibles 2." 2 p.m. Saturday, Southeast Branch.