My favorite thing about the lesson we were in is when we did the salt baking soda and cabbage juice project we were doing the test right now but i think that was the best project yet I had really fun with MY FRIENDS it was awesome when the bag was really hot all of us put it on our cheeks and it was really comfortable and we all learned how to do it and we all knew wat made it hot at the end it was the salt that made it hot it was AWESOME.