Check out Pinterest.com, there are cute minnie heads made with oreos, mini oreos as ears and dip the bottom part of cookie in colored chocolate, they have TONS of Mickey/Minnie ideas
we did a Mickey theme for DS' first birthday last month. most of the ideas could be easily switched to Minnie. i need to take a picture of his invitations, but they were Mickey ears.
his cake (i got the fondant ears for the cake and cupcakes off etsy):
and if you go over to the crafting boards DISigns (i think thats what its called) you will find TONS of print outs and tshirt iron on designs if you search through enough. Or you can start your own thread requesting something