National STEM Festival powered by EXPLR

Description:
Open Build Day is a free, family-friendly public expo celebrating student innovation and the future of science, technology, engineering, and math. Hosted as part of the National STEM Festival and the America250 initiative, the event brings together more than 50 National STEM Champions—middle and high school innovators from across the country—to showcase projects in areas such as artificial intelligence, health and medicine, sustainability, aerospace, and more.

Visitors can participate in more than 20 hands-on STEM activities led by industry experts, educators, and community partners. Interactive exhibits, live demonstrations, and maker experiences are designed to inspire curiosity and creativity for attendees of all ages.

Why families love it

• Free access to exciting STEM experiences
• Meet real student inventors and innovators
• Hands-on activities encourage creativity and problem-solving
• Great opportunity to explore STEM careers and emerging technologies
• Activities designed for kids, teens, and adults to enjoy together

⚠️ Good to know

• Advance registration is required due to limited capacity
• Walk-in availability may be limited
• Comfortable shoes are recommended for exploring exhibits and activity stations
• Additional exhibitor and activity details may be announced closer to the event date
• Located in downtown Washington, D.C., with access to public transportation options

Best For

Families with curious kids, middle and high school students interested in STEM, aspiring inventors, educators, homeschool groups, and anyone looking for a fun, interactive learning experience.

Cost: Free (registration required)