How to Make a Marshmallow Blow Gun out of PVC Pipe
Make a Marshmallow Blow Gun out of PVC Pipe. To shoot, simply stick a mini marshmallow in the end of the gun and blow. The amount of air power is important. This would definitely make a great project for a scout group, church group, or after school club, or just as a family activity. http://hative.com/fun-and-creative-diy-pvc-pipe-projects/
"This outside engineering project uses PVC pipe and running water to captivate young builders for hours. The play is open-ended: kids experiment with various ways to put the pieces together, directing the water along different paths and adding such fun elements as funnels, tubing, and sprinkler heads."