Requirements: smooth rocks, crayons (paper removed), oven, work board.
- Collect smooth rocks and clean them.
- Put them in an oven at 180 degrees for 15 – 20 minutes.
- Using heat proof gloves, take them out and place them on an appropriate work board (one that is heat proof and one you won’t be worried if crayon gets on).
- place the crayon on top of the rock and watch it melt. Place lots of different colours in layers to come up with your desired look.