A pacifier tree is a Scandinavian tradition where children in a rite of passage sacrifice their pacifiers to the tree. The child's pacifiers are tied together on a ribbon or piece of string and are left behind on the tree in clusters tied to the branches often with a little drawing or parting note attached, and it's a huge deal for the children.
In Hammer Bakker close to where I work there is such a pacifier tree (in Danish "Suttetræ"). I didn't now until I passed by today almost by accident. This tree had been visited many times based on the number of pacifiers left here, and the majority of them obviously have been hanging there for quite a while since many of them were moldy and blackened .The ones on this shot looked like they were left here recently ... I hope the child who left them behind had no regrets...