Second annual SJ Mini Maker Faire - BANGPhotos
Jack Turner, 13, displays his animatronic robot mouse at the second annual San Jose Mini Maker Faire at History San Jose Park in San Jose, Calif., on Sunday, September 4, 2016. (Josie Lepe/Bay Area News Group)

Jack Turner, 13, displays his animatronic robot mouse at the second annual San Jose Mini Maker Faire at History San Jose Park in San Jose, Calif., on Sunday, September 4, 2016. (Josie Lepe/Bay Area News Group)