I just downloaded this FREE e-book. It is a complete Chemistry Curriculum for older elementary students. It has instruction, parent/teacher guides, student pages, relatable stories, and easy, fun experements. Made available through the American Chemical Society. And it's FREE!!
This is an erosion experiment done comparing which type of natural erosion occurs the quickest: rain, glacier melting, or wind. This would be a great activity that could be done in class when talking about natural types of erosion. The students could postulate which they think would work the fastest, do the experiment, and write up their results which we could talk about as class.