Mia Ortiz of Roxbury, Leila Smadi of Dedham, and Brooke Simko of Wellesley look at the results of the “Invisible Giants” experiment presented by Science from Scientists at the February 20 ParkSCIENCE Children’s Festival hosted by the Boston Parks and Recreation Department at Franklin Park. 

Instructor Shannon Morey of MIT heated aluminum cans over an open flame and then dipped them in water, causing the cans to collapse as if they were crushed in the hand of a giant.