1. Kendall Square is an innovative and bustling neighborhood located in the city of Cambridge, Massachusetts, just across the Charles River from Boston. It is known for being a major hub of technology and biotech companies, as well as a center for academic and research institutions such as MIT. The neighborhood has a vibrant atmosphere with a mix of restaurants, cafes, shops, and cultural attractions.

2. Kendall Square is not a specific attraction with a set working time, as it is a neighborhood with various businesses and establishments. However, many of the restaurants and shops in the area have their own operating hours. If you are looking for specific information or contact details for a particular place in Kendall Square, it is best to check their individual website or contact them directly.

3. Kendall Square is easily accessible by public transportation, with several MBTA bus and subway routes serving the area. The closest subway station is the Kendall/MIT station on the Red Line. There are also bike lanes and bike-sharing options for those who prefer cycling. Generally, there is no entry fee to visit Kendall Square as it is a public neighborhood, but individual businesses and attractions may have their own ticket prices if applicable.