Here's a great way to use plaster of paris, to make your own pencil holder... in the shape of a crisp bag!

You will need:
  • newspaper
  • a kitchen roll tube
  • an empty packet of crisps
  • plaster of paris
  • an old jug
  • spoon
First, put down lots of newspaper or a plastic bag, because things are going to get messy!

Then eat a bag of crisps, but try not to rip the top of the bag when you open it. Clean out the crumbs and the grease from the inside.
Take an empty kitchen roll tube, and put some cling film over one end.

Pull it down to the bottom so that it's flat over the tube.
Flatten the cling film end of the kitchen roll tube, and put it inside the crisp bag, cling film end down.
Buy some plaster of paris or moulding powder from a chemists or art shop. Follow the instructions on the packet to make the mixture.

As a guide, apply two cups of plaster of paris to one cup of water. Make sure you use an old jug to make this. Keep stirring until all the lumps have gone.
When the mixture is ready, take your crisp bag and scrunch it down a little bit with the tube upright.

Hold it into position with one hand.
Pour some plaster of paris between the outside of the kitchen roll and the crisp packet. Let some of the plaster of paris run beneath the end of the tube, so pull it up just a little bit. As it starts to set, pour more plaster of paris until you reach the top of the crisp packet. Don't worry if it overflows as you can clean it up later.
Don't pour any leftover plaster of paris down the sink! Pour it into a carrier bag, and then throw it away, or you'll need a plumber!

Leave it to set, which will take about 15 minutes.
Take out the kitchen roll tube.

It can be a bit stiff so ask someone else to help you if you need it.
Clean off any plaster of paris stuck to the outside, and put your pens and pencils into the crisp packet. And there you have it - a pen and pencil holder made out of a crisp packet!

Try it yourself!