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Ongoing

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... View Article

$20 – $25

Tucson Bird Alliance: Sweetwater Wetlands Field Trip

Sweetwater Wetlands 2511 W. Sweetwater Dr., Tucson

This popular birding hotspot in urban Tucson offers an easy walk through marshes created by Tucson Water to see waterfowl, regular and visiting warblers, and several exciting species hiding in... View Article

Free – $5

Tucson Bird Alliance: Sweetwater Wetlands Field Trip

Sweetwater Wetlands 2511 W. Sweetwater Dr., Tucson

This popular birding hotspot in urban Tucson offers an easy walk through marshes created by Tucson Water to see waterfowl, regular and visiting warblers, and several exciting species hiding in... View Article

Free – $5

Tucson Bird Alliance: Sweetwater Wetlands Field Trip

Sweetwater Wetlands 2511 W. Sweetwater Dr., Tucson

This popular birding hotspot in urban Tucson offers an easy walk through marshes created by Tucson Water to see waterfowl, regular and visiting warblers, and several exciting species hiding in... View Article

Free – $5

Arizona State University: Earth Day Stadium Walk 2026

Mountain America Stadium 500 E. Veterans Way, Tempe

Join University Sustainability Practices and SRP for the free ASU Earth Day Walk at Mountain America Stadium. This unique celebration of sustainability includes a three lap walk around the stadium... View Article

Free

Children’s Museum of Phoenix: Earth Day Expo

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

Join us in the Children’s Garden for fun and educational outdoor activities in celebration of Earth Day! Wednesday, April 22nd from 9am-1pm. HANDS-ON PROGRAMS INCLUDE: Compost Corner – Explore the world... View Article

Free with Admission

Reid Park Zoo: Sean Kenney’s Nature Pop!

Reid Park Zoo 3400 Zoo Court, Tucson

Part art. Part engineering. Totally amazing! Add a pop of wonder and a pinch of nostalgia to your spring with Sean Kenney’s Nature Pop! Marvel at over 40 wildly creative... View Article

Free with Admission

Desert Foothills Library: Oh Snap! Photography Club

Desert Foothills Library 38443 N. Schoolhouse Rd., Cave Creek

Are you passionate about capturing moments, exploring new perspectives, or improving your camera skills? The Oh Snap! Photography Club at Desert Foothills Library is a friendly and supportive community of... View Article

Free

Tucson Botanical Gardens: Garden Story Time

Tucson Botanical Gardens 2150 N. Alvernon Way, Tucson

Join us every Wednesday at 10 am in the Education Classroom for an interactive story session. This fun hour features nature-themed stories, songs, puppets, and sensory activities! Held rain or... View Article

Free with Admission

City of Tempe: Tools for Living with Dementia

Pyle Adult Recreation Center 655 E. Southern Ave., Tempe

Join Elaine Poker-Yount, CDP, of Successful Aging for a presentation on "What’s Actually Normal as We Age and What Really Isn’t?" We all forget things occasionally, or struggle to find... View Article

$50

Earth Day 2026: The future we build

Rob and Melani Walton Center for Planetary Health (Walton Center) 777 E. University Dr., Tempe

The Julie Ann Wrigley Global Futures Laboratory® invites you to celebrate Earth Day by exploring the future we build. Since 2021, GFL has served as Arizona State University’s hub for Earth Day.... View Article

Free

Earth Day 2026: The future we build

Rob and Melani Walton Center for Planetary Health (Walton Center) 777 E. University Dr., Tempe

The Julie Ann Wrigley Global Futures Laboratory® invites you to celebrate Earth Day by exploring the future we build. Since 2021, GFL has served as Arizona State University’s hub for Earth Day.... View Article

Free

Maricopa County Library District: Coral Reef Biomes

MCLDAZ - Litchfield Park Library 101 W. Wigwam Blvd., Litchfield Park

Celebrate Earth Day by learning about one of the world's most interesting ecosystems! We will discover the different ocean animals and plants living in coral reefs and use our knowledge... View Article

Free

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... View Article

$20 – $25

Avondale Public Library: More2Explore

Avondale Public Library - Sam Garcia Western Avenue Library 495 E. Western Ave., Avondale

Explore your SMART side with a variety of STEAM (Science, Technology, Engineering, Arts, and Mathematics) activities from painting and crafting to building and robotics. 2nd, 4th, and 5th Wednesdays. 2-3... View Article

Free

Maricopa County Library District: QC LEGO Club

MCLDAZ - Queen Creek Library 21802 S. Ellsworth Rd., Queen Creek

Calling all LEGO Masters! Join us each month as we create and display amazing LEGO creations. Don't forget to bring your creativity; you'll need it! •5-8 year olds with guardian/parent... View Article

Free

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... View Article

$20 – $25

Maricopa County Library District: Fearless Kitty Rescue

MCLDAZ - Fountain Hills Branch 12901 N. La Montana Dr., Fountain Hills

Learn of the great work performed by Fearless Kitty Rescue in our community. Support their efforts by making upcycled cat toys.

Free

Maricopa County Library District: Earth Day Celebration!

MCLDAZ - Guadalupe Library 9241 S. Avenida Del Yaqui, Guadalupe

Come and celebrate Earth Day with us. We will learn some gardening techniques. Plant a sunflower seed in a pot for you to take home. All materials provided

Free

City of Chandler: Sow You Want to Start a Garden

Chandler Nature Center 4050 E. Chandler Heights Rd., Chandler

Start your very own garden! Learn the basics like soil health, watering, the best plant varieties for the desert, and how to cultivate your plants from seed to harvest. 16+... View Article

$12 – $17