Although I have always been interested in nature, I only started bird watching in 2010, as a 50 year old. I was on holiday in Caithness, Scotland with my wife and we went to a bird hide to look at breeding Arctic Tern and Blacked-headed Gulls. I haven't looked back since. With the younger generation, I think modern electronics and social media are the answers. A digital camera, so they can record what they see and id later, a birding app, rather than a field guide at first, the guide will come later and a few choice birding websites. It seems to me that people leave school today with a lack of general knowledge, but they can find anything they need to know far more quickly than I can using smart phones, tablets etc. If the subject is broached during a discussion about biodiversity and how birds fit into the various ecosystems and their role in that ecosystem, its a good excuse to take them into the field and they can see first hand how many different species populate various ecosystems. I found that a digital camera was a very useful tool to record birds and then use the photos to look up the species in field guides and seek advice on the id section of this forum at the beginner stage. I can recognise most of the European regulars but some need a photo and a field guide later on for confirmation. May be if you could show a group of young people a film like The Big Year, it will also generate a sustainable interest.