Laurie Dottle and son Justin Dottle, left, get help from Logan Haug, right, in getting their scribbler machine to work at the Lawrence Hall of Science’s Inventor’s Lab program at the Vacaville Town Square Library Wednesday. (Robinson Kuntz/Daily Republic)

Zachary Bronk, 5, left, watches as Lila Haug, 6, right, lets her battery-power scribbler machine run at the Lawrence Hall of Science’s Inventor’s Lab program at the Vacaville Town Square Library Wednesday. (Robinson Kuntz/Daily Republic)

James Guyett, 3, inspects a battery-powered scribbler machine at the Lawrence Hall of Science’s Inventor’s Lab program at the Vacaville Town Square Library Wednesday. (Robinson Kuntz/Daily Republic)