Kids under 6 are free on almost all public transport in Austria.
For older kids there are a lot of discounts, but many of them are only cheap if you use public transport regularly. (eg. rail card family from the ÖBB for 19€ a year, or upper austria regional tickets for school children for 77€ a year, etc.)
One problem is that it's not just train tickets, but you also need tickets for bus/tram/subway, and every city/region has different systems, so for every trip I spend about 15min trying to figure out which tickets to buy.
Well at least in CH you only have one ticket for everything (yes including regional rail providers, buses, ships, even many cable cars), so maybe AT could follow the idea. Plus you have that nice little feat called "EasyRide" (initially from a startup) where you enter that you start the ride and who accompanies you, and it will compute your final ticket costs only when you say "checkout". 90% of the cases it comes cheaper than I would have thought when buying the tickets by myself (the rest 10% of time the price is the same as estimated)
For older kids there are a lot of discounts, but many of them are only cheap if you use public transport regularly. (eg. rail card family from the ÖBB for 19€ a year, or upper austria regional tickets for school children for 77€ a year, etc.)
One problem is that it's not just train tickets, but you also need tickets for bus/tram/subway, and every city/region has different systems, so for every trip I spend about 15min trying to figure out which tickets to buy.