Seniors and older travellers should not be put off the budget route. Hostels have the image of catering only to the young and in the summer it may seem that all the budget rooms are taken by 18-25 year old backpackers, but hostels are for all. Most now have double and single rooms and even the HI's are slowly reducing their age restrictions. Bavaria is an exception, they only accept those under 26. Get around this by staying in Independent hostels.
Seniors are also eligible for discounts on trains, museums, tours and much more.
It is always worth asking. Families with young children will need to plan their trips with kids in mind. Bored, tired or sick children can quickly make a holiday a nightmare, but there are plenty of things to keep children happy. Plan on travelling slowly keeping journeys short and bring plenty of games and activities to keep them occupied. Hostels are catering more to families providing child's beds and meals, but check them first as some are not suitable with rowdy, noisy bars and unsuitable rooms.