This is a short explanation for above mentioned workpiece. If you want to create a workpiece too please follow the step-by-step instructions under courses (navigation bar to the left).
This creation has been made out of Fimo and Creall-therm. Both kinds of clay can be intermixed.
First I have made several rolls of different coulours of green clay (take a look at Basics, navigation bar to the left).
 The polystyrene foam ball was directly covered with it. The ball will then shrink in the oven when heated. If you cover the form first with tin foil you keep the form intact. This is not the way as you want to be able to extract the ball after baking your workpiece. 
 The partly covered form is put on a thick layer of green clay as seen on the picture. Be sure to have the right thickness, it has to support ball and animals lateron. Put some roses in the crevases. This creation will now be put into the oven for about 30 minutes.
Meanwhile I have modelled the animals (tiger, bees and snake).
After the cooling process the animals are put on and into the workpiece (see picture on "English" page). The whole creation has to be baked again for 30 minutes (110 degrees C).

For more information on how to model with polymer clay: fimo-frutsels.