What you need:
- Plaster of paris
- Paint
- Water
- Cardboard from toilet rolls
- Scissors
- Duct tape
- Rubber spatula
- Spoon
- Grease-proof paper
What to do:
- Take a toilet roll tube and cover over one side with duct tape, leaving the other side free.
- Line the inside of the roll with grease-proof paper and place to one side.
- Using the directions accompanying the plaster of paris mix, add your powder with the water, substituting two tablespoons of water with a paint colour of your choice. Mix together until completely combined.
- Fill each toilet roll tube with your mixture, using a rubber spatula to help. Distribute out the plaster of paris mixture in different containers, using a different coloured paint each time to make a rainbow collection of chalks.
- The plaster should set in about an hour, but wait for two hours to remove from the tube.
- To remove, peel off the duct tape at the bottom of the tube, then peel off the cardboard and paper.
- Leave the chalks to dry for one to three days before using.
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