Here is a delicious lesson! While a good portion of the processes presented is more apt for a chemistry class, younger physical scientists will still benefit from, and thoroughly enjoy, viewing this film about what happens when cookies are baked. Concepts as simple as phase change, mixtures, and chemical reactions can be addressed, in addition to more specific occurrences like the Maillard reaction and the restructuring of sugars and proteins. If you have kitchen access, it would be fun to follow up your lesson with a baking activity!