Hi Madhukri,
Saw your Itinerary. and

you can make it. Only thing is as its the month of December, the weather will be really chilly. So just check how feasible the climatic conditions will be. Check the website
www.wetter.com which gives you 7-10 days of forecast. We made our trip in April when my daughter was 21 months old and without any problem. But as it was summer then it was easy for us to travel around with her and still enjoy the snow. The itinerary looks hectic only on paper, once you are in swiss amidst nature you forget all that and just wish to see more.
We started our trip from Zurich, did some sightseeing over there. Then by evening train went to Interlaken, overnight at Interlaken. Next day morning went to the Top of Europe- Jungfrau, were there for 2-3 hrs, then went to Schilthorn the same day. Came to Interlaken by evening. Day 3 morning caught a train to Lucerne- went to Titlis, came back in the evening and did sightseeing in Lucerne. Day 4- Caught a train going to Brig from where we boarded the Glacier Express (a beautiful journey) and got down at Chur. From there we went Back to Zurich to catch our flight.
So enjoy your trip. DO try to make a plan with the exact timings and train no., platform no. and all. Take the printouts and keep handy. You will save
on time once you are there then. Also see if you can do some sightseeing of the cities as they are also worth seeing.
bye till then
Leena.
Start packing, hardly 3 days to go.

wave