T-Shirt Ideas

I really want to do some small doodles. When you read manga the artist usually has small doodles in the back of the book and they are usually like scenarios from the artists life. They are really cute and they sort of look not sketchy but just a little unrefined. They have sort of shaky lines. I think they would look really cute on a t-shirt. I want to draw a girl sitting on the words holiday matinee and then maybe some little robots. Truthfully I'm not really sure. I also might draw some little figures and kind of collage them together. I think that might work.