So I have to pick a springy object to look at or observe and do a report on. I half want to get a trampoline but... yeah.
So any hints on something bouncy that has oscillations?
Ubi caritas est vera, Deus ibi est.
"The mark of your ignorance is the depth of your belief in injustice and tragedy. What the caterpillar calls the end of the world, the Master calls the butterfly." ~ Richard Bach
Maybe a spring board? You could go down to a local gym and look at the mechanism in that. Or perhaps a diving board? Would that come under springy? And there's always bouncy castles though I don't know where you'd get one of those...
Some people are hourglass shaped, some people are apple shaped, some people are pear shaped, some people are even bean pole shaped, but if we’re not careful we all become banana shaped. This is your gentle posture reminder. — Ranger