How to carve a bar of soap into a smaller soap shape. Discussion of various tools that can be used for this purpose. A little silliness - the carving I made is a kind of slug thing - I'm going to cast it in plastic and glue one googly eye to the upturning end. See the flat part?
Step 1: outline the basic shape
Draw a side elevation of the shape you'll carve on the side of the soap. Starting with 2-D on one side of the block is a good way to start thinking in 3-D.