Take the kids on a toboggan run at the Oeschinen See Alpine Slide. You and the kids will cruise down a 750 meter long run with some fantastic scenery in front of you. But you probably won't be looking at the scenery.
The "tobaggans" have a hand lever on them so you'll be able to control your speed. Hard to say if parents should go first or last on this. Probably last because you'll end up slowing down the kids.