Step 1: first you will need a latex or rubber mould
Step 2: Now you will need your mixture, this can made be either plaster, concrete, cement whichever you choose its upto you. There is very little expense involved as these ingredients are very cheap.
Step 3: You will require a holder for your mould to balance on this can be made of plastic, cardboard or wood.
Step 4: Fill the mould full of water and then pour the water into a bucket this gives you a gauge to how much mixture you will need.
Step 5: Spoon your mixture into your bucket and mix until it is a thick paste
Step 6: Pour the mixture into the mould and wait approximately 2 hours for the mould to dry.
Step 7: Remove the mould from the holder and rub warm soapy water over the mould completely, this causes the latex to expand and will enable you to peel the mould off easily.