remember the Valentine mini cheesecake box? well, here's how I did it.
-2 small shirt box tops (mine were roughly 8x11x1) and 1 bottom of the same size box
-clear Mylar sheet (I had some presentation covers in the office that were just collecting dust)
-extra cardboard the same thickness as your shirt box (old shirt box or a cereal box works well, just keep in mind you'll see it)
-round things to trace around
take a circle shaped item slightly larger than your cupcakes and trace around it on some junk mail postcard or paper. take a smaller sized circular object and trace it on either side of the bigger circle. cut out the shape to use as a template.
take the bottom and fold it flat with the inside facing up.
that's it! decorate it with paint or stickers or whatever and fill with cupcakes, or onesies, and tie a ribbon around it.