Thingamajig® is a USPTO-patented Science Fair & Engineering Expo all summer programs event. 

Thingamajig® offers more than a dozen hands-on challenges designed to spark curiosity and showcase kids’ S.T.E.A.M. skills while they have fun building or simply designing new inventions. It is in its 29th year nationally, and 9th year at the YMCA of San Francisco. It's one part science demos and activities and another part engineering competition.

Free to Be Inspired, Amazing and Unstoppable

The world needs more innovators and hands-on problem-solvers!

WHEN: Friday, June 28, 2024, from 9:45 AM to 2:15 PM

WHO: All K-8th Students enrolled in the YMCA of San Francisco's Summer Programs

WHERE: The San Francisco County Fair Building, 1199 9th Avenue, San Francisco, CA 94122. Located next to the San Francisco Botanical Garden in Golden Gate Park.


Is your organization interested in group volunteering?

Please reach out to Jennifer Trombley at for group volunteer opportunities and help make this event a day to remember for Bay Area youth.