To make onions, you will need a bright white and an off-white block of sculpey III clay and a knife.
Spread each color out into a seperate long rectangle.
Place the off-white rectangle on top of the white rectangle and roll them up into a long rope.
Roll the rope with the palms of your hands against the table until it is very skinny and small. Cut off a little piece from the end.
Flip the knife blade over and press the onion against the table to make it a flat circle. It should have an interesting pattern of white and off-white blended together which makes it look more tasty as an onion.
Bake the onions on a cookie sheet covered in wax paper for 15 minutes at 215 degrees. Remove and let cool before using in your doll recipes.