Here you have an example of what you could print and put in a booth at a convention. This is a template that @sketchbeetleart did.

Photo of their template

Get $5 off GoFundMe!.png

Link for the editable version: https://www.canva.com/design/DAGLLLg_fU8/uEvh7cmiUIVLSV6JfRGsiA/edit

https://www.canva.com/design/DAGWbWgAJ0Q/kMncFgXtNu3sfLF1hBzcrw/edit