Help! Coming to London today with 4 teens. Cheapest way to travel?

[Blarneybear]

I can use contactless I think on the tube? If I get them to pay contactless how much will it be travelling a few times zone 1 and 2? I can't make head not tail of the website thanks

£40 

My 2 friends and I share an uber for most journeys and find that cheaper than 3 tube tickets.

Yes had literally no idea about uber, didn't know how to call one, didn't know if it was like Paris where taxis will only take 4 people! Still they all had a fantastic time and lunch was 40 cheaper than I'd budgeted so it was ok