About Imaginology

Each April, OC Fair & Event Center transforms into Imaginology, a free family event produced by OC Fair staff that focuses on STEAM education and hands-on learning.

Children, teens, families and school groups dig into science, technology, engineering, arts and math. Imaginology provides unique experiences for attendees of all ages – from preschool to high school, and their parents and grandparents – to build, create, play, observe and interact through activities that help them see the possibilities of a future in STEAM fields. Imaginology features makeshops, demonstrations, competitions, hands-on activities and entertainment, as well as food and fun. Youth competitions give students the chance to be recognized for their unique talent and accomplishments.

Imaginology was canceled in 2020 and held virtually in 2021. The event debuted in 1989 as Youth Expo and was renamed Imaginology in 2014. This free event is presented as a community give-back by OC Fair & Event Center and supported by local partners and patrons.

What is STEAM?






At Imaginology, kids and their families will not only see a world of wonder, but can participate in a wide range of fun and educational hands-on activities designed to inspire and encourage academic and career exploration.

All exhibitors at Imaginology will feature activities from one of the five STEAM subject areas: science, technology, engineering, arts and mathematics. Students are invited to build, interact and explore various activities using skills that directly correlate with a STEAM career.


Saturday, April 13, 10 a.m. – 4 p.m.
Sunday, April 14, 10 a.m. – 4 p.m.


Admission is free. Parking is $12.


Imaginology at the OC Fairgrounds
88 Fair Drive
Costa Mesa, CA 92626

Schedule of events

2024 Imaginology will feature live entertainment and tons of activities. 

Food and beverages

There will be food options available for purchase at Imaginology. 

Things to leave at home

To promote a safe, secure and enjoyable environment, all guests are subject to bag/package checks, as well as magnetic wanding. Any dangerous, unlawful or prohibited items that are surrendered at the gate will not be returned. Please leave these items at home:

  • Cans or glass bottles
  • Hard-sided coolers
  • Folding chairs
  • Clothing that is indecent or offensive; exposed tattoos that are indecent or offensive
  • Pets or other animals with the exception of service animals as defined by the ADA
  • Alcohol
  • Selfie sticks
  • Umbrellas
  • Photography tripods or professional camera equipment
  • Drones or remote-controlled surveillance devices
  • Guns, knives, stun-guns, tasers, mace, pepper spray, tear gas or any other firearms or weapons, regardless of whether the guest holds a concealed weapons permit
  • Narcotics or other illegal substances
  • No smoking or vaping at OC Fair & Event Center