Over 50 box shapes that you can craft are given at this site. Here is just one of them:
SMALL BOX:


You never know when you might like a teapot shaped box (it is the last one in the series).
It was cute, but who would eat all those marshmallows?
I came up with a different cake by using a boxed white cake mix, the required ingredients, and then baked the cake in a 9" x 15" jelly roll pan. After the cake cooled and was then frozen overnight, I cut out a sheep cardboard form and cut around the form placed atop the frozen cake. (It helped to freeze the cake thoroughly before cutting it.) The "waste" cake taken from around the edges of the sheep form was frozen for later use with strawberries in a different dessert.
After spreading the cut-out sheep cake with white icing, I sprinkled on colored sugar daisy petals purchased at the craft store. And I added two goofy eyes to the face of the sheep. With a little imagination, you can see the result looks a bit like a sheep:
Maggie did a beautiful job with the sheep, shepherd and dog!
This is Betty blowing out candles on the cake at her birthday party yesterday.