Initially she started out sorting them by colour; white, grey, brown and multicoloured and extended this by ordering them from light to dark. Cakes also sorts them into size; big, medium, small and extended this by comparing using different and the same. My favourite way of sorting them is by texture; rough, smooth and bumpy (which Cakes says is a mixture of rough and smooth) she extended this by doing it with her eyes closed.
Cakes currently prefers to sort by only one attribute at a time. With a little encouragement she will sort them into colours and then texture or size but when sorting by two attributes it always involves colour (I assume this is due to her being the more comfortable with this attribute than the others).
What you will need: