Do you have any discount

I did not. There are some discounts available online, as well the Aquarium is part of the Boston CityPASS program that gives you access to four different attractions for 56$, which ends up being about a 45-50% discount if wanted to visit all those places.

In addition to what Tyler mentioned, the Boston CityPASS is good for 9 days.

If you know anyone with access to a library in the area, there are Library passes that get up to 4 people in for $10/each!

Of course AAA discount, military, and others.