What you will need:
Stove top or hot plate
Double boiler, or a metal bowl that fits inside a pot
Cardboard (NOT FOAM) egg cartons
Wax - canning/sealing wax, old candle stubs, etc.
Some kind of small flammable material - wood shavings or sawdust, paper small animal bedding, 100% cotton dryer lint, etc.
Oven mitts, grill gloves, or hot pads