Half term in London with young teens

[CuriousRunner]

We're going to London this October with young teenager DCs. There are so many options of things to do that I don't know where to start. I'd love to have your recommendations. I'm also happy to throw a bit of money at some special small or private type activities. Thanks!

Have they been to London before? If not, a quick tour of Big Ben, Tradalger square ;next to National gallery), and Buck palace.

Choir of Men - good fun musical
Back to the Future - another good musical for teens

Camden -

Harrods - also worth visiting

Natural history museum is really nice for teens and it's free (but you need to book a place). I would also recommend Greenwich observatory and museum.

Ask them what they want to do? One of my DC loves super cars and we spent an afternoon in Knightsbridge and Chelsea looking in all the garages. Not anything I would have thought to do but we all enjoyed it. We always have one activity which has been planned and paid for, we have enjoyed the London Eye, Westminster Abbey, Tower of London and Science Musuem. Last time we went to a show about the gunpowder plot which was near the Tower of London.
Get the children to plan the routes of the underground.
Enjoy