All you will need for this is some 1/2 inch pvc pipe ( 1/2 inch diameter of hole in the middle)
Step 1: the Materials!
All you need is-
-1/2 pvc pipe
Step 2: How Long Should Your Bow Be?
Your bow should be the as long as your arm span.
Step 3: Where the String Goes
On the ends of the pipe you can cut a V shape cut 2 inches from each end.
Step 4: Now for the Length of the String. and Tying
The length of the string should be 4 inches shorter than the bow. For the tying string you should make a loop knot and put the string through the loop.
Step 5: Final Step!
Now bend the pipe so you can loop the other end of the string on the the other V shape cut. The bow should be fairly bend like the picture below
Step 6: And Your Done!
And all you have to do is get a straight stick or buy a wooden dowel, sharpen then fire
Note the bow is a weaker than other wood bows but is still strong.