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The University of Arizona: Richard F. Caris Mirror Lab Tour

The University of Arizona Steward Observatory 933 N. Cherry Ave., Tucson

Explore the cutting-edge of astronomical innovation on this 90-minute guided tour of the Richard F. Caris Mirror Lab at the University of Arizona. Learn how pioneering engineering, optical science, and precision manufacturing come together to create the world’s largest and most advanced telescope mirrors—each 8.4 meters (27 feet) in diameter. Located beneath the U of A’s football...

$20 – $25

HeatSync Labs: Caffeine & Coworking

HeatSync Labs 108 W. Main St., Mesa

The lab is open! Bring your projects, get excited, and make things!       HeatSync Labs is a 501(c)3 nonprofit hackerspace in Mesa, Arizona dedicated to helping you get access to the tools and skills you need to make awesome stuff. Remember we have no staff; we're made up entirely of volunteers including you!...

Flagstaff Festival of Science: Preschool Express

Flagstaff City - Coconino County Public Library - Downtown Library 300 W. Aspen Ave., Flagstaff

Come to the Library for special, science and car themed storytimes Ages 3 - 5     Part of Flagstaff Festival of Science 2026. 10-Day Science Festival Our flagship September event featuring 100+ free science experiences for all ages.  

Free

Flagstaff Festival of Science: Robot Rally – VEX Obstacle Challenge

TynkerSpace 1515 E. Cedar Ave., Flagstaff

Jump into the world of robotics in this fast-paced, hands-on workshop! Participants will experiment with VEX robots, learning how to control movement, adjust design, and navigate challenges. Then it's time to hit the course and race your robot through an obstacle track and see how it performs. Make quick tweaks, try again, and improve your...

Free

Children’s Museum of Phoenix: Finding Balance

Children's Museum of Phoenix 215 N. 7th St., Phoenix

Light as a feather, heavy as a stone, and everything in between. Using our scales, explore how to make different materials balance. How many corks do you need to balance a Hot Wheels car? This is a great introduction to STEAM concepts for all toddlers. Special thanks to ACE for sponsoring this program! Ages 0 - 4

Free with Admission

Pima County Public Library: LEGO® Play at Nanini Library

Pima County Public Library - Nanini Library 7300 N. Shannon Rd., Tucson

Come build with us! Folks of all ages are welcome to dig into our massive piles of LEGO® bricks and let their imaginations run wild. We've got Duplo blocks on hand for our littlest builders, too! No registration needed — just drop in. Light refreshments provided while supplies last. Ages 3 - 18

Free

Pima County Public Library: LEGO Club

Pima County Public Library - Oro Valley Library 1305 W. Naranja Dr., Oro Valley

LEGOs are fun for the whole family! You’ll build with LEGOs of all sizes. Display your LEGO creation at the library for all to enjoy! LEGO Clubs helps improve math skills, science skills, literary skills, social skills, and problem-solving skills. Ages 3 - 18

Free

Phoenix Public Library: Block Party

Phoenix Public Library - Saguaro Library 2808 N. 46th St., Phoenix

Join us every Wednesday for a free form, brick building, engineering extravaganza!   Ages 3-12

Free

Tempe Public Library: Maker Lab

Tempe Public Library 3500 S. Rural Rd., Tempe

Discover new tech, tools, and hands-on skills each month in the Maker Lab.   Each month in the Maker Lab, you’ll get hands-on with the latest tech and creative tools—from VR and 3D printing to laser cutting and more. It’s a chance to experiment, build real-world skills, and bring your ideas to life. Ages 12...

Free

Pinal County Library District: Sewing

Pinal County Library District - Apache Junction Public Library 1177 N. Idaho Rd., Apache Junction

Want to learn earn to sew or just like sewing? Attend our open sewing sessions to learn or just be around others who enjoy sewing! Projects are prepared for those who wish to learn to sew. Ages 10+

Free