Materials include: 250ml erlenmyer flask, rubber stopper, glass tubing, plastic tubing, fish tank air pump, ovan bag, valve thingy i found at lowes.
https://www.dropbox.com/s/wcu62cv3iibn91w/science.mp4?dl=0
https://www.dropbox.com/s/wcu62cv3iibn91w/science.mp4?dl=0