science asembly at PCS

The science Assembly was when the teachers did science experiments. The first one was when Aunt Angy had us guess witch part of a roll of toilet paper did u have to blow on to get it to unroll.  I thought it was the bottom, but then she took grandpas leaf blower and blowed on the top and it unravelled, all over the corner of the gym! then she took dry ice, water, and mixed it together in a bowl smoke started coming out of it then she slid soap over it and a big soap bubble!