Friends of ours have only kid (f)aged 9. they're thinking of inviting one of the girls friends on holiday with them next year. my initial thought was 'eeek - what if they get landed with paying full cost of extra child (airfares/extra accommodation/ as well as board, activities etc. and what if the kids then fall out on Day 1 and it's a disaster & their holiday's ruined???' Seemed like a minefield to me. But they find it hard going if its just the 3 of them all the time, and the girl's too old for kids clubs and the like. Am i just a doom-monger? What do other people think?