Kolkata city of joy

Sights that make Kolkata the “City of joy” .  Streets, Yellow cabs, Howrah, Tram etc …
From a half day stroll through those streets

Number of days :  half day
Starting/Ending point : netaji subhash chandra bose kolkata airport
Mode of Transport : Cab, Tram, Bus, Rickshaw
Approximate distance : 40 kms
Budget : below 1000 for 2