Step 1: Listening to teacher and children
"Flippo" (Pog) project for children with severe learning disabilities. Children were asked to draw a pog, with a letter on it and the name and the mascot of their class (a toucan).
The letters were small, the word "toucan" was considered unimportant and most children preferred more than one toucan.
Reactions were more enthusiastic than I had hoped for.