what are great games to keep children occupied in the school holidays? Thanks?

Pokemon. Unlike 'old fashioned' games, pokemon is now a huge source of socialization, one with more staying power than fads.

But if you must play a board game, there are some completely insane ones. If you want their attention, you'll need something completely insane.

Dragonstrike, by TSR. Thats near the top of that list.

When I was young, i was really into domino rally. but then I had a giant basement made of concrete so yeah.

One thing: If you do get them such a board game, or any other, check online first to see if its been "solved." That means, theres a method in which one can ensure victory or stalemate and nothing can be done to stop it. Connect 4 is a particularly notable one. If anyone figures out its solved and doesnt tell the others, well...