I thought of one more but it's less wordy and children can understand it. If you take a lego, with enough of them in a particular arrangement...you can create a wheel of sorts so it rolls. Legos don't roll unto themselves but are necessary parts to create the wheel-like behavior. Legos are boxy so they can't roll by themselves obviously and yet they can roll when put together in a certain way. This concept relates to nature in that atoms are building blocks to create properties of things in a particular arrangement. It's easier to understand because we have no magic bias surrounding legos or sense of purpose or importance in coming to that conclusion.