Start melting the wax. Take the cupcake cups and add the dryer lint. Once the wax is melted, pour the wax into the cups with the lint. Don't fully cover the lint, but leave a little of lint un-covered so it has a chance to ignite. Then fold the cup over the lint.
Step 3: Lighting
Now all you gotta do is light the outside cup and watch it go. Good luck and be safe. Don't burn your house down :)