My kids are asking to have a city type holiday next summer. They're 17, 15 and 9 and I'll be the only adult. I've been to Barcelona before and I think there's the right things for them to be entertained. I'm thinking 4 nights in the city somewhere then train over for 4 nights in Stige for some chilling. I'll probably have to go air b&b or at least self catering to reduce cost as budget is rather small. So my questions are where to stay in Barcelona to walk to most places or at least easily access transport? I'd like to take them to the football grounds, Olympic stadium, and probably just walk around the outside of the buildings like Gaudi. Is air b&b the right places to look for cheap accommodation? Is there a better beach resort that Stiges nearby? And what sort of accommodation should I be looking for there? Anything else I need to know or consider? THANK YOU! 