If you want to contact other families going to the same holiday resort at the same time, this website will match childrens ages to within 3 years (i.e. it won't match a family with toddlers to a family with teenagers). Families can send each other messages through the site and hopefully meet up when they are on holiday.
Take a look at \link{http://www.makeholidayfriends.co.uk\this}