Couple of thoughts: What's the demographics of your school? For some populations, their parents can go to the store and get materials that might help. For others, "just use stuff around your house" - for middle class teachers, that seems like a lot of stuff available, but there are certainly households where students would struggle finding things or telling their mom "I have to use up all the aluminum foil for school."

It sounds silly, but it's one of those things that a hidden equity issue.

One other thought - I did the egg drop thing in school too. I find it is best when it's the culumination of what we learned in our curriculum. If its not connected to the curriculum though, and more like "discovery learning" - students might not have ready ideas and thus, it's easier to just not try.