The Metropolitan Museum of Art is the most visited museum in New York, with more than 6M visitors per year.

1. Solomon R. Guggenheim Museum
   
2. Whitney Museum of American Art
   
3. Museum of Modern Art (MoMA)
   
4. Hall des Lumières

1. Egyptian art | Met
   
2. Butterfly Conservatory | American Museum of Natural History 
   
3. Fighter Jets | Intrepid Sea, Air & Space Museum
   
4. Van Gogh’s Starry Night | Museum of Modern Art

1. American Museum of Natural History 
   
2. Intrepid Sea, Air and Space Museum
   
3. Hayden Planetarium 
   
4. Rochester Museum & Science Center

1. Colour Factory 
   
2. Museum of Broadway 
   
3. Museum of Ice Cream 
   
4. Museum of Illusions

1. New York Transit Museum 
   
2. Brooklyn’s Children’s Museum
   
3. Children’s Museum of Manhattan

Entry to the Metropolitan Museum of Art would set you back $30, while the Museum of New York charges $20.

Usually children below a certain age, senior citizens, and students with valid ID proof can avail discounts on New York museum tickets.

1. New York State Museum
   
2. Brooklyn Museum
   
3. American Museum of Natural History.

1. Noguchi Museum
   
2. Rubin Museum of Art 
   
3. Museum of the City of New York
   
4. Jewish Museum

There are usually no age limits to enter museums. Certain exhibits deemed inappropriate for children might be off-limits, but children are allowed entry into museums. Usually, children below 16 have to be accompanied by an adult.

1. Motor disabilities by providing step-free access and ramps for wheelchairs 
   
2. Visual disabilities by providing audio descriptive guides 
   
3. Audio disabilities by providing guides fluent in sign language

New York museums do not enforce any dress codes. It is advisable to dress comfortably and modestly, while being respectful of the local culture.

Yes, visiting a museum in New York would take atleast 3-4 hours, a lot of which would involve moving from one exhibit to another. Do make sure to wear comfortable shoes for the outing.