I'm not sure if you can appreciate Dachau (or any KZ for that matter) at the age of 10 to the fully extend. I agree, that you have to teach your kids about that part of the history as well, but I think, that it might be rather premature to do it at such a young age.

The last WWII location I've visited in the last couple of months was Hiroshima. It's an absolute must see while visiting Japan, but I've noticed that many children seemed rather bored by the memorial park and apparently simply didn't realize the importance of it.

In the end, it is however impossible to generally recommend visiting or not visiting Dachau with children. You certainly have to take into account the interests of your children.

If you think that Dachau is not suited for your children, you might look at alternatives in and around Munich. There's a Legoland near Günzburg, a Ravensburger Spieleland (Ravensburger is a very popular German brand for puzzles) near Ravensburg. If you want to stay in Munich, you can always visit the Deutsches Museum: They have a huge selection of topics.

https://www.kz-gedenkstaette-dachau.de/directions.html