Whether you call them gimp, scoobies, boondoogles or any other name, thin, bendable PVC plastic strings are ideal for weaving into keychains. You'll find them at the local craft store in a large array of colours. With little more than some PVC string and a metal key ring, even a beginner can create a unique piece that reflects her taste and personality.
Cut three pieces of PVC string into 12-inch lengths. Choose three complementing colours. Bring the ends of the three strings together. Tie a knot in the strings 3/4 inch below the ends of the strings. Pull the strings to secure the knot. Cut away the excess string above the knot.
Separate the end of a metal split-ring keychain. Slide the open end of the key ring through the knot you created in Step 1. Pull the knot tight again to ensure the strings are taut. Pass the knotted end of the strings through a candle flame or lighter for 10 to 15 seconds, or until the ends melt. If the string catches fire, blow out the flame. Let the end cool for five to seven minutes.
Attach a safety pin to the key ring to make it easier to work with. Secure the safety pin to an upholstered chair's arm or your pant leg. You want something that will hold the ring end of the strings securely.
Separate the three strings. Straighten the strings so they all lie flat.
Braid the three strings as you would braid your hair. Bring the far left string overtop of the middle string and let it rest between the middle string and the far right string, which in turn makes it the middle string. Bring the far right string overtop of the new middle string, resting it between the far left string and the middle string, which in turn makes it the new middle string. Repeat the entire process until the entire length of the string is braided. Stop 1 inch from the bottom or when you reach the length you want for the keychain.
Tie a knot in the end of the three pieces of string to secure the braid. Cut off any excess string and remove the safety pin to finish the key ring.
If desired, add additional decoration to your keychain by tying beads to the ends of the strings once you finish the braid.
When you heat the ends of the strings, the metal key ring may become hot. To prevent burns, do not touch the ring until it cools completely.