8 Hands-On Experiments to Teach Kids About Chemical Reviews: 57Published: May 24, 2012Author: Sadie423 Observing the Formation of a Gas. The first experiment is a very simple one that shows children Show How a Chemical Reaction Can Produce Heat. Next we have an experiment that shows how a Show the Formation of a Solid. Next up is the formation of a solid. You can also use baking as an Show the Occurrence of a Color Change. The last thing to look for when trying to tell the difference See all full list on owlcation Physical and Chemical Changes Activities for Kids Classroom Activities: Physical and Chemical Changes. Paper Give each student one or two pieces of scrap paper, newsprint, or pages from old magazines. Challenge them to work in groups to create as many physical changes for the paper as possible. They may want to tear, cut, or color on the piece of paper. They can crumble or even wet the paper too.