I just pre-booked tickets for Sagrada Familia but I am now really nervous. I booked through the SF official website, so it was legitimate. It gave me the option to print the tickets at home, or pick up from a ticket machine once in Barcelona. When I tried to print from home, I kept getting an error message. Now I'm worried that I won't be able to print and will have to get them from one of the ticket machines in Barcelona. My concern is this--I have two young children who will be with me, and the last thing I want to do is drag them around Barcelona looking for one of these ticket machines. Does anyone happen to know WHERE one of these machines is located, and can give me specific directions as to where I can find it? Also, will there be an option for the printing instructions to appear in English? One super close to SF would be preferred, of course. I'd appreciate any info!