The Hemingway Home is a great attraction. The tour tells some of the very interesting stories from Hemingway's life, there are 6-toed cats, and the house and grounds are neat to see.
Amy's favorite is from Key Lime Pie Company, and Orlando's favorite is from Kermit's, but there are many places to try if you want to eat your way around the island.
There are a few sunset sail companies. We liked seeing the crew sail the boat, the view of Key West from the ocean, the sunset on the water, and the unlimited drinks. This may not be for everyone, but we loved it.
There are many fun things to do, see, and eat in Key West. Mallory Square is a favorite of some, Duval Street is where the party's at, and there are other things too. This is our short list, but we recommend checking out the other attractions available to see what fits your interests!