This is my sons first year in school and I wanted to start a tradition of doing something special on the last day of school. So I want to make him a special shirt to wear to school and let his classmates sign it.
Fabric paint ( I used Painters Opaque paint markers )
I place the cardboard inside the shirt. Inserting the cardboard is so the markers do not bleed through the other side. Then just write a message. Whola!