You will need the following:
1 bar of Ivory soap (it must be Ivory!)
1 microwavable plate or bowl
1 microwave oven

Put the Ivory soap on the plate. Make sure it is dry.
Put it in the microwave on high for 1 – 2 minutes.
Keep an eye on it, mine was done after only a little over 1 minute.
When you remove it, let it stand for a minute or two (it will be hot).
Then grab yourself a hunk and see how it feels.
I found it to be a little like Styrofoam only very crumbly.
Have fun!!!