Check out this gift card to a whale watching experience for 2 adults and 2 kids from Boston Harbor Cruises. No expiration date given.

From their website: "When you whale watch with BHC, we turn up the wow factor by making the adventure memorable—and educational. Certified New England Aquarium naturalists are on board for every trip, to make learning about whales as much fun as seeing them."

https://www.bostonharborcruises.com/