You will need 120 g of fondant/gumpaste to create stones.
Use different shades of grey.
If you are using fondant it's good to add cmc to each colour separately, so that you don't over-mix the colours trying to knead the cmc in.
You will need 40 g of teal fondant/gumpaste for the tail.
Save some teal fondant/gumpaste for the eyes.
Body - 9 grams.
The bone tool can help you form the neck.
You will need about 4 g of bright green flower paste.
Let it dry a little.
You will need about 1 cm ball of pink.
You can support the tail with a piece of paper towel.
Arms - 2 g (each 1 g).
Don't worry if the joining is not perfect - we'll cover it with hair ;)
Head - 20 g.
Hair - about 30 g.
A few details....