Learned this on Pinterest and tried it today! Heat oven to 500 degrees and put some marbles (you can put clear colored or clear with color in the middle) and heat for 20 mins...longer is OK but no better... After, put them in a bowl of cold water. I used a regular ceramic bowl and was afraid of shatter but nothing! It just cracks inside and creates GORGEOUS sparkles! Kids loved it and soooooo easy! Give it a try!
Simply paint or draw on your design. When you are done, let them dry for a good 24 hours, then you heat set your designs by "cooking" them in a regular oven. 150 degrees celsius (300 degrees Fahrenheit ) for 35 minutes. After you have done that you can safely use it with food, use it in the microwave and dishwasher.
This is actually something I made in art my junior year of high school. Turn an old record into an awesome bowl. First spray paint one side white, paint a design with acrylic paint (mine is my finger print, which was the assignment), then melt it in the oven and cool it over a bowl.
All Natural Oven Cleaner // A cup of water, 10 drops of essential oils of your choice (lemon or orange are good ones) ½ cup of regular salt, 1 and ¼ cup of baking soda, ¼ cup of white vinegar and 2 teaspoons of liquid castile soap.