The lighthouse is a symbol of the Omaha-based Lane Thomas Foundation
, the nonprofit the boy's family established after his death to support families of children who need organ transplants in Nebraska's largest city.
The gold brick lighthouse features two blue stars, commemorating the youngster who introduced himself saying, "I'm Lane Thomas; I'm 2."
"We find comfort that so many people continue to remember our sweet boy, Lane, and we believe the lighthouse stands as a beacon of hope and support for families in the depths of despair," his parents, Matt and Melissa, said in a statement.
Disney said it erected the sculpture to spread awareness of the family's foundation.
Lane was playing outside the Grand Floridian Resort and Spa on June 14, 2016, following an outdoor showing of "Zootopia" on the beach outside the hotel. He and other children were building sandcastles, and Lane was collecting water in a bucket. The boy's sister, Emma, was in a playpen 20 to 30 yards from the shoreline.
It was about 9 p.m. -- prime hunting time for alligators -- when Lane waded into ankle-deep water and the alligator snatched him by the head and dragged him underwater. Witnesses tried to save him. Matt Graves attempted to pry the gator's mouth open, but the animal escaped with Lane.
Disney closed its beaches the next day as authorities searched for the alligator and the boy. Lane was found in 6 feet of murky water
10 to 15 yards from the shore, Orange County Sheriff Jerry Demings said at the time.
Wildlife biologist Jeff Corwin told CNN, "That gator came in, grabbed that boy, pulled him, the dad startled that gator, the gator let him go and then the boy drowned."
Disney faced scrutiny on traditional and social media. While there were "no swimming" signs posted at the lagoon, there were no warnings about alligators. Signs at other Walt Disney World bodies of water did caution visitors about alligators and snakes.
Some critics also questioned why alligators were present at a vacation resort popular with children.
Several experts told CNN that the lagoon is connected to a series of canals that feed into larger bodies of water and -- given that Florida is home to 1.3 million alligators -- it would be impossible to keep them out of the resort.