Hey Ravi. Shimla and Kufri are popular winter destinations with a lot to do and see. Check out this trip that I found about these places. Hope it helps you plan your trip better. https://www.tripoto.com/trip/shimla-kufri-narkanda-trip
In Shimla there are so many places ..if u want to see Shimla through train then go from kalka to Shimla by toy train. afterward in mall road you find out so many things, go to Jhaku temple and it is also some kind of treking for you. go to kufri in early morning and enjoy the snowfall there. you find out some guys who gave you information about games . not kid games but you can definitely found out and try them on .you will love that