What You'll Need:
Metal chain (approximately 4.5 inches)
Two pieces hardware
First, flip the car on its hood and fix the two pieces of hardware on both ends with superglue. This serves to connect the car to the chain. You can use things such as an earring back or pinback. The key is that the hardware have a flat bottom (to glue to the car) and a hole (to put the jump ring through). Let it dry.
With the assistance of pliers, attach the chain to the car using a jumpring. Attach the charm to the jumpring as well. On the opposite end of the car, attach the chain to the jewelry clasp with a jumpring.
Now you're raring to go!