Make positives of whatever it is you plan to cast. Sculpting, carving, or braiding thin wax pieces is easiest.
Another option is to copy an existing object using silicone molding and a wax injector. I used mold-making rubber
, but here is an instructable for a different way to make silicone molds
. Make sure there is an opening from the side of your mold to your object so that you can inject wax with the wax injector. I made several wax copies of a phoenix figurine using the silicone mold pictured.
The objects which cast best in glass for us were the solid figurines, such as the animals pictured. However, some of the more delicate objects (some rings, a phoenix) also came out well.
Attach your objects to a wax sprue.