If you want to prepare food in the shape of characters, Mameshiba is the way to go. Mameshiba are a hybrid of beans and dogs and very popular characters in Japan. Their bean shape is quite easy and can be made with different food. We found a couple of great examples on different blogs:
bean
Here they are, the first two Mameshiba products we carry in our shop. Of course they are our favourite product of the week, as we have been working super hard to get them. They are iPhone hard covers for all iPhones 4S or 4 with very colourful Mameshiba bean designs. We think they are super cool as the patterns are slightly retro but the Mameshiba characters are super kawaii.