Travel /
Holidaying with a 9 and 8 year old in Southern Poland August 2014 [10]
Only you know your children, but the official site for Auschwitz recommends a minimum age of 14. To understand what you see, explanations have to be pretty blunt. I'd honestly steer clear on this occasion.
On the other hand, as the children have studied some history, you can see places like the Polish Air Museum, to the north of the city centre (includes some planes from the personal collection of Goebbels), the Royal Wawel Complex, the rynek - known as Adolf Hitler Plaz while under Nazi control during WW2. The former Jewish quarter (Kazimierz) is across the bridge from the former ghetto in Podgorze, where you will find Ghetto Heroes Square and the Mueum of the Occupation (Schindler Factory).
There again, there's the tethered balloon, boat trips on the vistula, the fire-breathing dragon (on the river bank, below Wawel), the puppet theatre, the city engineering museum and a raft of other things designed for or appealing to, younger visitors.
There are a couple of water parks around Krakow, a white water canoeing centre out by Tyniec and the rivers and lakes .... well, the Poles love to be in and on the water, so where you find water you often find canoeing, rafting, sailing, windsurfing, swimming, paddling, etc, etc. One place you could look at is Zywiec, where we have seen small holiday villages with dawn till dusk activities, but if you take a look here you'll see more :
1904loghouse.com/about-krakow-on-the-water/
1904loghouse.com/about-splashing-about-in-southern-poland/
1904loghouse.com/about-krakow-for-kids/
I hope all this is useful. Krakow is a wonderful city to visit but I'm really pleased you will be exploring further - the hills and lakes are beautiful.