So is that what you meant by rubber legs? The activity has pairs subject a chicken bone to vinegar and observe what happens over a period of days. Individuals then write up a lab report and document their observations and findings. 

Students examine and hypothesize about hard cooked and raw eggs before experimenting to see which one cracks more easily when dropped in a bucket. They open both eggs and compare them using a Venn diagram. They design a presentation...

Young scholars identify and examine adaptations in birds that enable them to fly. They conduct Internet research to relate these adaptations to the physics of flight. Students observe birds in flight and describe their behavior and...