A while back when my nephew visited, we made a quick Freezer Paper T-Shirt. I love how easy this is to do. I Am Momma Hear Me Roar has a great tutorial for Freezer Paper Stencils. I make it easier for myself and cut the Freezer Paper with my Silhouette.
We used two colors so we had to iron on the freezer paper, stencil, let it dry, and repeat. My nephew described what he wanted, then we searched for images, chose a cool font and had a lot of fun making this.