This is a fun and exciting experiment designed for 3rd-6th graders. It is the classic Diet Coke and Mentos "geyser" experiment, but with the added rigor of using the scientific method to answer the question "Which will cause a larger reaction: the sugar in regular Coke or the aspartame in Diet Coke?" This added element makes the experiment a fun way to add scientific inquiry practice for your students. Background knowledge on why the reaction occurs is included. Trust me your students will thank you!!!