Are Free Range Eggs Stronger Than Caged Eggs?

Science Fair Project Information
Subject: Zoology
Grade level: Primary School - Grades K-3
Academic Level: Ordinary
Project Type: Experimental
Cost: Low
Awards: First Place, Canada Wide Virtual Science Fair (2007)
Affiliation: Canada Wide Virtual Science Fair
Year: 2007
Description: Eggs are put in small plastic lids to hold eggs in place creating a triangle. A pan is placed on top of eggs and weights are placed on the pan until egg cracking sound is heard and until at least one egg breaks.
Link: http://www.virtualsciencefair.org/2007/grah7c2/