Yay, my grandparents have finally decided to visit me. I live in Stockholm, so I've never thought at length about what there actually is to see here. Additionally, I'm limited by walking distance constraints; my grand pa-pa isn't exactly a spring chicken.
So I'm desperate for suggestions on both what to do, what to see and how to accomplish this task without burning them out. I guess I have to form this as a plausible question - well, how about - given all the givens, what would be the best 1-day route through Stockholm, with subway/boat shortcuts and feeding frenzies?
Let's say my budget is that of a guy straight out of university, who decided not to get a job but to start his own business instead. So not way north of 100-150€.
EDIT FIRST DAY IN
Thanks a lot for your wonderful answers. We ended up going with what VMAtm suggested, and took subway to Gamla Stan. There were plenty of elevators, but they found Gamla Stan terrain hilly to navigate. We had to take a short break by the apparently famous ice-cream house. They complained somewhat about the ice-cream, but then we were good to go all the way to city-center metro by Åhlens.
Then we took the subway to Stadion, where I used to work, and had a nice meal at whatever-that-place-is-called. They were impressed by "Köttfärslimpa" and not so much by "Lövtunn bit".
It dawned on me that I haven't updated this page. Frankly by now it's just a blur. My grand dad has now passed away, but he mentioned the trip fondly very often while he was still alive, so I must have done something right.