Name a product that is in the decline stage of it's life cycle.

The shoe that is called Heelys. I no longer see people wear these shoes in shops or in school. They could change the shoe style and bit and make it attractive or re-adervertise it; using commercials or Guerilla marking technique. Most kids that were in that days would have grown up by now and there's a new set of kids. However, since they were born during that shoe was being promoted, they would have no idea about it, so if they promoted it again, they would buy it. Everything will keep repeating especially in fashion.