80-b here with a great blog and i am going to talk about changes in matter :). This is about chapter 3 and i gotta tel ya about it. The thing I liked about this chapter was the chemical reaction and the bubbling from the product of chemicals(there was some crazy thing there but it was super cool :). I also liked the finding out witch one could be the warm one I thought it was the baking soda I was wrong it was the type of salt that can't remember the name of and (on the 1st experiment I liked when the bag got melted and some of the liquid went though to the big bag :) ). So if you want a good experiment don't do bad ones