On the tag, I attached a little packet of flower seeds. On the back it says:
'Congratulations on your new packet of wildflowers. By picking up these seeds, you have chosen to do a service. Please plant them in a place that makes life more beautiful.
Vacant lots, sidewalk cracks or widow's front yards are acceptable.'
You can download the template here if you'd like to make some of your own.
Now, go plant some flowers!