DD, aged 16, is going to London with her boyfriend on a day trip, as they want to go to the NHM. They are both bright kids, but can be geographically challenged! Having looked at maps, they have worked out that they can walk from Victoria Coach Station to the museum, and it should take about 15 minutes. I don't know this area at all, but a friend has said that it's too far to walk.
Is it too far for two healthy 16 year olds? If so, is there a bus they can take? I'm not sure I trust them to get there on the tube, as neither of them have ever been on it.
They will have phones, so will be able to look at a map or satnav if needed, but I'd like them to print out a map too and know where they are going in advance.
Thanks in advance for any advice. :)