September is the starting of winter in India. Gangtok is called as Himalayan range of Sikkim. Here are some places to visit with a baby in Gangtok Ganesh tok
Flower exhibition Khecheopalri lake. Shillong is called as Scotland of east in the state of Meghalaya. Filled with rich history here are a few spots to visit with a baby
Air Force museum
State and don bosco museum. I would suggest Gangtok.