The North Bay Science Discovery Day is a one-day public free science festival designed to spark children’s wonder and curiosity for science, technology, engineering, and mathematics. With 98 organizations and over 150 hands-on interactive exhibits, explore rockets, beehives, robots, sharks, catapults, animation, animals, art, and more. Meet and talk to professional scientists and engineers. Admission and parking are free. No tickets needed. Rain or shine. Saturday, March 8, from 10 a.m.–4 p.m. northbayscience.org.