Berlin WelcomeCard

On the front page it says "available as an on-line ticket" Next page it says you get a voucher you need to exchange at Tourist Info points (Hauptbahnhof being one).

Never mind, I found it! On the Berlin WelcomeCard website itself, it says:

"Please note:
After booking, you will be sent an e-ticket as a pdf attachment. For the ticket to be valid, it must be printed on A4 paper and you must carry it with you.
The e-ticket is only valid for the person named and the period selected. It does not have to be additionally validated.
Remember to carry it with you at all times when using Berlin’s public transport system. The e-ticket is only valid if shown on request with an official photo ID."

I don't have access to an A4 printer in the US but they wouldn't just reject my ticket for that right?

A4 is virtually the same as 8 1/2 by 11. Use that

I don't have access to an A4 printer in the US but they wouldn't just reject my ticket for that right?

The exact paper format doesn't matter, the only requirement being that the ticket is fully printed and nothing cut off. If I have to print A4 in the US I use the format Letter.

Whether the Welcome Card is a good deal for you depends on precisely what attractions you intend to visit. Compare the cost of normal daily or weekly transport passes combined with the three-day Berlin Museum Pass, which does not include transport but gives access to many of the city's major museums.

Also consider that many of Berlin's museums are quite large, and the city is rather spread out. Those two characteristics mean that you might not get to as many museums as expected during your vidit. As of 2015 the basic card did not cover the Museuminseln musems, and the M I pass did not get you out of the long entry lines at the busier MI museums.

Thank you everyone. Indeed, I know that Berlin is really vast and so I have made sure not to overplan our visit there. I also want to be able to predict everything as much as possible (minute details like ticket validation etc.). The WelcomeCard sounded good to me because it is unlimited and valid on all forms of public transit in Berlin. The convenience, I think, makes up for otherwise waiting and buying individual single-trip tickets. Call me paranoid, but I wouldn't want to be a sitting duck for some pickpocket (and I know they love to hang around busy stations looking for unsuspecting prey).

Since we really only have two full days in Berlin, I plan to visit the Charite Museum of Medical History (morning) and the Stasi Museum (afternoon) on Sunday, and the DDR Museum/ Checkpoint Charlie/ Topography of Terror/ Berlin Wall Memorial the next day. So I don't see the point of getting a museum pass since there are only about three museums we need to pay for.

If you don't intend to use the discounts from the Welcome Card, you can get day passes which are cheaper. The Welcome Card is not the only alternative to single-journey tickets.

@ Philip: Thank you for that suggestion. I've just priced using single-trip and day tickets and it works out to be about 20 euros cheaper than getting two 72-hr Berlin WelcomeCards. Plus, I can still print them from home!

By the way, the BVG website states that "The reduced fare is valid for children aged 6 to 14." But don't students get reduced fares too?

"The reduced fare is valid for children aged 6 to 14". But don't students get reduced fares too?

On the Berlin CityTourCard up to three children (up to 14 years old) travel for free. There is no reduction for students (apart from the semester tickets for students studying in Berlin).