[header] How to make modeling clay in a slow cooker [title] Preheat the slow cooker. [step] To ready your slow cooker for cooking the clay, it's important to preheat it. Plug it in, and set the temperature to low. 
That will allow the slow cooker to heat up slowly. [substeps] While children can help with the measuring and mixing of the ingredients, an adult should handle preparing and heating the slow cooker.