More than 80 AAAS volunteers deployed jelly beans, Braille lettering and auditory illusions to creatively demonstrate the science of the five senses to thousands of curious participants at the 5th USA Science & Engineering Festival in Washington, D.C.

AAAS seeks member volunteers to engage with children and families interested in science, technology, engineering and mathematics (STEM) at the 2018 USA Science & Engineering Festival Expo. The Expo is on Saturday, April 7, from 10:00 a.m. - 6:00 p.m. and Sunday, April 8, from 10:00 a.m. - 4:00 p.m. at the Walter E. Washington Convention Center in Washington, D.C. There are two volunteer opportunities.

Encourage an active, refreshing summer with hands-on learning.

Understanding how the five senses evolved can help inform how human sight, smell and taste continue to shift based on the environment, according to three researchers at the 2017 AAAS Annual Meeting in Boston.