Bake them for the recommended time on the clay packet and allow to cool. Stick them on either side of the head, again covering with tissue and glue and allowing to dry.
Once your Skeleton is dry, water down some brown acrylic paint and paint it all over the skeleton. Again let the paint dry thoroughly. You may feel that once dry, it could do with a second coat. Paint away and once again let this dry. You want the skeleton to look leathery.
Dry-brush a tiny amount of white paint - or phosphorescent paint for that spooky glow! - over the teeth to make them stand out. To dry-brush, put a small amount of paint on your brush and then take most of it off again on a piece of tissue or paper, leaving you with nearly a dry brush. You then rub the brush over the bit you want to highlight, in this case the teeth, leaving the tiniest bit of paint behind.
I then used black acrylic paint to dry-brush over parts of the skeleton to give more definition, for example around the rib cage. Leave to dry.