Here's what you need to make your Marshmallow Blaster:
Cut the tape ahead of time
It's handy to have a piece of tape ready so you can keep the tube from unrolling once you get it to the right size.
Roll the tube
Roll the file folder diagonally. You want to end up with it being slightly cone shaped. The wide end of the tube should be a bit bigger than the marshmallow.
Adjust the opening
Tape the tube
When you've found the right size for the opening, tape the tube.
Load the marshmallow
The marshmallow should sit snugly inside the tube. Think of the marshmallow as a plug that seals the tube closed. Use your finger, a marker, or the handle of a spoon to wedge it firmly into place.
Take a deep breath...
Blow through the tube!
Did you know?
Because the marshmallow sits tightly in the tube, no air can get past. The marshmallow is a plug that has sealed the tube. When you blow into the tube, you increase the air pressure. At some point the air pressure overpowers the marshmallow seal. When the seal fails, the air rushes out, carrying the marshmallow with it. This is exactly how a leaf blower works. It blasts out a column of air that carries off the dirt and leaves.
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