We're visiting Bavaria with DD(5), and planned to visit the Berchtesgaden salt mines. It looks really fun and interesting, and I have to admit the miners' slides to go in are a draw.
But DD broke her arm a week ago
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Are the slides very fast? She will have a cast on, so light knocks are ok, but I'd be concerned if the slides are fast enough that she might risk getting out of control or having a bad landing.