The posters changes design slightly every year to keep it fresh, but still recognizable.
Every year we have a competition for the kids. Some kind of art, usually.
One year we put QR codes on all the waste baskets in town, to attract attention to them.
Scanning it could give a price like two cinema tickets or a gift certificat to the city center.
This way we virtually turned every waste basket into a lottery ticket.
The campaign needs a lot of graphics, including t-shirt design, badges and lots and lots of graphic for social media use.