Pfffft! Imagine thinking that a Newton’s Cradle could be constructed using objects that are malleable opposed to rigid! For their bosoms movement energy would not be transferred to the opposing side, but instead be put towards deforming the succulent mamories until entropy takes hold and you’d be utterly disappointed in the lack of satisfactory motion! By, what a jolly good chuckle you give to me with this prosperous image! Upvoted, this post is!