1 st day Go to kalimpong do sightseeing
and than Rest in beautiful Munthum Village stay
Day 2 Go to darjeeling via mirik doing sightseeing of tingling view point,gopaldhara tea state,pasupati market (a market in Nepal) ,simna view point,joropokhari and than reach to darjeeling town and enjoy night out in chowrasta and stay in Darjeeling .early morning visit sunrise in tiger hill than Batista loop,rock garden,tea garden and after doing breakfast leave for gangtok in way visit lovers meet point ,do rafting if u wish .Rest in any hotel in mg road Gangtok.enjoy nightlife in gangtok.
if u have more days viisit
Nathula at China border (must see)