Photo Gallery: Imaginology at the OC Fair & Event Center

Sijin Joung, 8, tries to form a bubble over the head of classmate Ricardo Rocha, 7, at the Bubblemania station on opening day of Imaginology on Friday at the OC Fair & Event Center in Costa Mesa.

Sarah and Daniel Bunkowske pretend to milk a cow during Imaginology at the OC Fair & Event Center in Costa Mesa on Friday.

Neo Nasstrom, left, and Shu Guo, both 10, play chess on a giant board during Imaginology on Friday.

Andrew Harrison, 10, tests his skills with a hoop during Imaginology on Friday at the OC Fair & Event Center in Costa Mesa.

Billy and Cora Davenport play with giant chess pieces during Imaginology at the OC Fair & Event Center in Costa Mesa on Friday.

Kristine Weyerhauser feeds a painted lady butterfly on opening day of Imaginology on Friday at the OC Fair & Event Center in Costa Mesa.