Science, music, food and fun for all ages are featured from 10 a.m. to 4 p.m., Saturday, April 21; free. The UA School of Music performs; the new Falaj water oasis indoor and outdoor exhibits are unveiled; the Arizona-Sonora Desert Museum offers an animal encounter; and the Physics Factory presents science and art activities. Also featured is a prototype of the GoE3 combination universal car-charging unit, which will enable the first cross-country electric vehicle-charging system. Visit b2science.org
for more information.