St. Louis STEM Events Calendar 2026: Free & Family-Friendly
St. Louis has a thriving STEM event scene — from weekly free workshops to annual robotics championships. This calendar rounds up the best recurring and annual events for families who want to keep kids engaged with science, technology, engineering, and math throughout 2026.
Recurring STEM Events (Ongoing)
These events happen regularly — put them on your family calendar:
Ellie's Free STEM Saturdays
FreeFree weekly hands-on STEM workshops for kids and families. No enrollment required, no cost. Coding, robotics, science experiments, and more.
St. Louis Science Center — Free Admission
Free (exhibits)Free admission to all exhibits every day. Planetarium shows, GROW gallery, live science demonstrations, and seasonal programming.
St. Louis Public Library — STEM Workshops
FreeFree coding workshops, maker activities, 3D printing, and STEM programming at library branches throughout the city.
Annual STEM Events in St. Louis
Mark your calendar for these annual events — dates vary year to year, so check each organization's website for 2026 specifics:
FIRST Robotics Competition — St. Louis Regional
High school robotics teams compete in St. Louis. Free to attend as a spectator — an incredible way to see what STEM education leads to.
St. Louis Science Center — Science Carnival
Annual outdoor science festival with hands-on activities, demonstrations, and exhibits for the whole family.
FIRST LEGO League — Missouri State Championship
Elementary and middle school robotics teams compete. Great for kids ages 9–16 who are interested in joining a team.
STL Youth Robotics Showcase
Annual showcase of student robotics projects from teams across the St. Louis region.
Ellie's FutureMinds Designathon
Ellie's Academy's annual student design and innovation competition. Open to all enrolled students.
How to Find More STEM Events in St. Louis
New events pop up throughout the year. Here are the best places to stay informed:
- ·Eventbrite — search "STEM St. Louis" for upcoming events
- ·STL-Style.com — community events calendar
- ·St. Louis Family (stlouisfamily.com) — family-focused event listings
- ·Patch.com St. Louis — neighborhood news and events
- ·Facebook Events — search your zip code + "STEM" or "coding"
Know of a St. Louis STEM event we should add? Email us at [email protected] and we'll review it for inclusion. You can also browse our full St. Louis STEM Resources directory.