You’ll Need:
Approximately 12g of dry plaster of Paris
An old or unused dish
A spoon
5ml water
Enough modelling clay to make a 12cm diameter ‘pie’ about 3cm deep
Natural items such as leaves, sticks, shells, pine cones or anything interesting you can find outside

How to Make a Mould:
Roll out a clay ball into a circular ‘pie’ about 12cm in diameter and about 3cm thick.
Turn up the edges of the clay about 2cm to hold the plaster of Paris.
Take your natural objects and press them into the clay to make a mold of each.
Remove the objects from the clay.
You now have several fossil moulds

How to Make a Cast:
Add 5ml of water to 12g of plaster of Paris in your dish.
Use a spoon to stir this mixture until it is smooth.
Carefully pour the plaster into the clay mould.
Fill it completely to the top of the turned up edge.
Allow the plaster to dry for about one hour.
Carefully remove the fossil cast from the mould.
Set it aside and allow it to dry 24 hours before handling.
Paint your fossil cast once dry to recreate sedimentary rock colouring.

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