With your ruler and pen, mark a point at one inch. You'll be making two strips, one that's 1' x 5'' and one that's 1' x 10'.
Cut your two strips
Tape the longer strip together to make a circle
Do the same with the shorter strip. You should have one large circle and one small circle
Tape the straw in the middle of the smaller circle. If your straw has a bendy section, like this one, tape over that section and then snip off the end of the straw
Tape the larger circle on the other side in the same way.
Give is a nice throw! Tips, keep the small circle in the front and throw it high above your head.