The museum of Auschwitz-Birkenau will take you back in time so that you can learn a bit of awful things that happened during the WW2.
I would suggest to come early in the morning or with online reserved ticket because tickets might get sold out. The waiting queue for tickets was just 15 mins but in top season I believe it will be longer. For the whole tour you should save up to 3,5 hours time slot (+ time you would like to spent in there on your own). It is partially inside and partially outside tour so consider weather condition (rain or high temperatures)
The visit itself was a great reminder of history with a very knowledgeable guides that provide lot of information and it will be useful for adults as well as teens. I wouldn´t suggest this activity for young children.
Except of specific location you are allowed to take pictures and video but I would appeal to keep in mind that you are on a place where many people had been executed.