Check out salzburgerlandcard
This is special card designed for families, children and for groups who want to take advantage of the many places of interest and sights throughout the province of Salzburgerland (including of course Salzburg, but also all of the other areas of the province). There are >190 attractions included on the card, which offers special reductions, discounts and in many instances free entrance! The card is available from May 1st through to October 26th. It really offers exceptional value for money, for example adults only pay Eu 43 for a 6 day pass, or Eu 52 for a 12 day pass; children between ages 6 -13 only pay Eu 21.50 for 6 days, or Eu 26 for 12 days; and for the younger children under 6, it’s is absolutely free!
The cards are available from many outlets and from the local Tourist Board in Flachau and other villages and towns. Or you can arrange for the card online at www.salzburgerlandcard.com.