Marshmallow Guns

Materials (1/2 inch schedule 40 (thick walled) PVC pipe, you can take a miniature marshmallow to the hardware store and check out which pipe is best):

 

4 short pipes (4 inches long)

1 long pipe (12 inches long)

2 90 degree elbows

1 T fitting

1 Cap

To use:

Place a miniature marshmallow in end A.

Blow on end A.

Marshmallow will come out end B.

The internet has a lot of info on marshmallow guns, if you are interested in variations.