Start with a ball of tan/ecru polymer clay
Roll it out as thin as possible
Cut 2 matching rectangles
Mix translucent and red clay
Roll it out very thinly
Cut into a smaller rectangle than the tan
Make a clay sandwich
Smooth the edges together
Texture with a brush, aluminum foil etc
Get some orange pastel power onto a brush
Dab it onto the tart until it looks like this
Make some icing by mixing TLS and white clay
Try your best to get it neatly on top - this part's a mess! Then use a dotting tool to make little indents along the edges
Use clay or oil pastels for the next step.
Scrape off tiny bits of every color
Sprinkle on top of the white
Cut out a corner to look like a bite. Now it's all set to bake!
Bake at the appropriate temperature and let it cool. When cool, you can choose to glaze it or not, then cut a strip of magnet and glue it to the back. Voila, adorable little poptart!