I'm not a ski fan, but if you are, this is fantastic for you. It covers all of Norway's history in its national sport, and shows progression and exhibits throughout various Winter Olympics. There's a great array of technical clothing and skis, if you're interested in seeing how technology in this field has developed over time, but the ultimate star is undoubtedly the Jump Tower.
It's worth the trip alone to see this, and to take a trip up on the funicular lift to the very top, and marvel at what the competitors have to do during competitions. Though warning: if you're scared of heights, brace yourself, because it IS a long way up.
Once you've completed your visit, you can buy a turn in the ski simulator, and (fake) see what it's like to participate in a slalom event or go down the ski jump itself.
Get the metro straight out of Oslo centre, and take in the stunning views as you climb up the hillside. The museum is about a 15 minute walk uphill once you get off the train, so don't walk it if you have an issue, otherwise it's worth it.

















