Hobbies And Interests
Things You'll Need
Instructions
Find a box about 1 foot square. It should be open at the top and closed at the bottom.
Fold all four flaps on the open end inward so they are flush against the sides of the box.
Cut a 6-inch-diameter hole in the closed end with a craft knife.
Reinforce the edges of the hole with duct tape where the outer flaps of the bottom meet. This will prevent the flaps from coming apart.
Make a cross out of two 5-inch strips of duct tape on the middle of an unopened trash bag. Make a second X overlapping the first but offset 45 degrees. The two Xs should look like an asterisk together.
Flip the bag over and make another duct tape asterisk directly above the first.
Lay the bag flat over the open top of the box so that the asterisk is right in the middle. Press the bag down so that it sags about 4 inches into the box at the center.
Tape the bag to the outside of the box with duct tape. Tape all the way around to create an airtight seal.
Reach into the box and thread a screw hook through the center of the tape asterisk. Screw it into a small block of wood about 1 inch in diameter. The wood block should be outside the box in the center of the asterisk.
Cut a small slit in the side of the box, about 5 inches down from the top in the middle of one side. Cut a second slit in the middle of the opposite side.
Put a small piece of dowel (2-3 inches in length) through the center of a large rubber band. Thread the rubber band through the slit so the dowel is against the outside of the box, held there by the tension of the rubber band.
Thread the band through the second slit and around a second small dowel. It should be stretched taught across the middle of the box.
Hook the screw hook on the rubber band. Put a piece of masking tape over each dowel to hold them in place, and seal the slits to stop air from leaking.
Pull back on the wooden block and release it. The rubber band will pull it down, sending a jet of air out of the hole in the bottom of the box for several yards.