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Cracked Marbles menagerie

How do I find instructions for making cracked marble animals? I used to do it and had a little design book of critters but can't find it now. You started by heating marbles on a cookie sheet at a high temp. I think it was 450 for 15? minutes? Then pour them into cold water in the sink to make them crack. Then you used some awfully smelly glue and other small pieces of arts and crafts to make critters such as a worm, dog, cat, mouse, etc. They were really cute and I would love to do them again.