Category Archives: Science 3rd Grade

Experiment: Hollow Bones

Birds have hollow bones. Hollow objects are lighter than solid objects and, because of this, birds can fly. In this science activity 3rd graders saw how strong hollow bones can be!

1- Roll 3 sheets of paper into tubes. Tape the edges of the paper so the tubes don’t unroll. Now you have 3 “bones” in all.
2- Stand the 3 “bones” on end and then balance a paper plate on top.
3- Add coins to the plate one at a time to see how much the structure can hold. (We used some craft jewels instead).
4- Continue adding coins until the “bones” collapse.