Hi, going to London in a couple of weeks with a 13 year old. How do I go about getting discount travel on the tube? As adults we will do the tap in tap out with our cards but if we do that with her it won't know she's eligible for a child's fare? Also, I'm a bit hazy on geography, is the museum of London vaguely near the cable cars – we are keen to do both. Any other recommendations for a teenager? Thank you