We have Explosion card pattern that would be awesome with this! How-to Make a Fondant Explosion Cake- use royal icing to to make stars and other things. I would not use fondant tastes yucky, prefer buttercream icing .
DIY : Hello Kitty in Polymer Clay (FIMO). if you can do it with clay, you can do it with fondant.
How to make Cheshire Cat Grinsekatze
I love this little pool cake. or swimming cake? Little boy swimming cake!