Lake Balaton is good for watersports, and it's also good for spas - lots of hot mud to sit in! The language is fiendish, and as above, it's useful to know a bit of German to help you, and middle aged Hungarians will have learnt Russian in school as their second language from the years of occupation. Obviously English is now a more popular foreign language. If you like music or stately homes, the vast Esterhaz palace where Haydn was court musician to the fabullously wealthy Prince Esterhaz, is nearby (ie, a drive), and the old city of Szekesvervar with the historic centre, is worth seeing too. One thing to be sure of - don't call the Hungarians Slavs! They're not, and they will resent it! There will probably be a lot of Germans and possibly Czecks there as well. Obviously it's also a prime 'seaside' destination for the Hungarians themselves. The tourist agencies may well have set up things like trips to see Hungarian cowboys, who are very skilful, and that would be memorable for children too. There's probably a depressing number of Communist concrete hotels/blocks around still, but hopefully these are gradually disappearing?? Summer will be HOT. Wine is fantastic, food can be spicy (paprika!). If you get to Budapest, and are pressed for time, the best part is the old Buda on the hill, highly restored, but very maedival, and the beautiful Matyastemplom (St Matthew's Cathedral) and the 'fisherman's bastion' which is a series of white marbled walks and terraces below the cathedral. Unlike Vienna, the Danube flows right through the city. Watchout for pickpockets! Have a wonderful holiday.