We booked on the official website and not through a hotel hosting site - the direct booking included complimentary tickets

Hi Ram, No need to buy tickets online. It will be a part of your package of free attractions if you are staying at Parisian or Venetian. Else you can buy it on the spot from the ticket kiosk located near the attraction

Stayed in Venetian Macao. A lot of hotels nearby to Parisian since its located in what they call cotai strip. But of course its more expensive compare to hotel in Macau part. You can visit every hotel since their lobby have different entertainment. Like Wynn Palace Macau they have performance lake fountain and cable car. Galaxy hotel have diamond fortune fountain show in lobby. And don't forget to visit Senado Square all shopping area there, local food, souvenirs and and the famous facade church Ruins of St Paul also located nearby there.

The website says age 12 or under children need to buy a ticket. Price is HKD68 (USD8) for children's ticket for 7th Floor. If you buy the Parisian opening package, full family's ticket should be included. If you get a high floor room which looks at Eiffel Tower, you probably don't even need to visit the Tower! The room view is just as good.