What am I forgetting besides everything, I mean. I know I'll need to get some extra food in.... what else? We were going to get them Oyster cards and already have a couple of payg mobiles for visitors. They haven't travelled a lot with their kids (10yo and 8 yo twins - all boys). What should they do in London? We're in East London and they won't have a car. I still have a week before they get here, but probably need to start thinking a bit more about it sooner than the night before they arrive...
Thanks!