When Heather went while she was pregnant with Sawyer, she made the shirt (with iron on transfer paper) with their names on them. On hers, over the belly, it also said, "Coming in June... Sawyer!"
You could also applique a big pumpkin (ala Cinderella), coach or Mickey Head over your belly!
Oh... what about a big Spiral Cinnamon bun mickey head with bun in the oven under the mickey head? Place it on your tummy.
Love these ideas! The pumpkin and bun ideas are adorable!
Also...lost the quote about doing a tank like I made last trip (thanks for remembering babynala!) I was thinking about looking through the adult patterns I have to see what would work.