We are staying in highgate for February half term with 3 children, 3,7 & 9. Looking for fun things to do locally as well as in the city. Is it easier and cheaper to travel tube of bus? We are very flexible and will probably do the normal tourist stuff...Buckingham palace, london eye, river tour, Tower of London. We also want to live like locals too and want the kids to have a great time too. Any ideas?