About Imaginology

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

Children, teens, families and school groups dig into science, technology, engineering, art 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 S.T.E.A.M. 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.

What is S.T.E.A.M.?






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 are required to feature at least one hands-on activity that lands in one of the five S.T.E.A.M. subjects: Science, Technology, Engineering, Arts and Mathematics. This component of Imaginology is vital to the experience because it is what makes learning fun and relevant. Students are invited to build, interact and explore all kinds of activities using skills that directly correlate with a career.


Saturday, April 15
Sunday, April 16


Admission is free. Parking is $12.


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

Schedule of events

2023 Imaginology will feature live entertainment and tons of activities. Schedule coming soon.

Food and beverages

There will be food available for purchase at the 2023 Imaginology. List of foods and vendors coming soon.

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
  • Outside 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 the OC Fair