PRHS Lions

I teach manufacturing in high school. I've decided to start making some candles to show the casting process to my students. This is alot easier (not that is easy) and safer than working with liquid metal. Could someone give me basic list of stuff that I need to buy to get started? I have 20 students in my class. I want enough so each student can make one. Thanks for your time and I look forward to viewing you responses.