No, just as Colino772 mentioned, pick up your tickets at the office across the road from Sagrada Familia. And leave extra time before your tour is scheduled to start, it was very chaotic inside the office with multiple tours departing at the same time.

the TA listing for this tour operator seems to list 5:00pm as the last tour of the day. Tour lasts about 90 minutes

I saw people of all ages there including very young children. I did not see any signs that restricted ages at all. We did a tour which was nice, but not great. You can do an audio tour too which is probably better because the guide was hard to understand because it was so loud in there with all the people. It does get crowded so a timed tour may be better if you are going at a peak time.

I agree with the other persons comments. The 14 year old should be ok, but think it isn't really suitable for a 7 year old. Suggest just visit without going on the tour as still lots to see. A wonderful place..

I don’t know- for me it is a matter of timing, and my availability. I have had three tours- one great- two mediocre. They seem to be about timing of entrance and access.

No utilizé el servicio de guia, pero estoy convencido de que en español hay guias, en Cataluña las lenguas oficiales son el catalán y el español.