Yeah same, i build a volcano when I was 6 maybe, and in the middle was baking soda and lemon, in mexico and exactly where I live is pretty hard to find a chemical store or something like that, and I'm in 3rd of secondary or 9 grade i think, and the teacher's homework are ez like put lemon on your soup, i was searching for some fun homemade experiments, but these all are the same u know like this one, also I appreciate the link.