Donald Bell, of Alameda, drives "Kitty Grabs Back" in the toy car races at the Maker Faire at the San Mateo Event Center in San Mateo, Calif., Saturday, May 20, 2017. This weekend's Maker Faire is a showcase of invention, earsplitting pyrotechnics, robots, crafts and large-scale art. (Patrick Tehan/Bay Area News Group)