Disney is launching a website to create a global sing-along for "it's a small world" to mark 50 years since the classic attraction opened at the 1964 World's Fair in New York.
The website invites the public to submit videos of themselves singing the song.
Fans can also create virtual dolls on the site, mixing and matching faces, clothes and other elements to build a unique avatar-like figure.
The original "small world" attraction was billed in 1964 as "a salute to UNICEF and all the world's children."
To mark the 50th, Disney is donating $150,000 to UNICEF and will donate another $1 for each video and doll posted or shared on the site -- SmallWorld50.com -- up to $100,000.
The "it's a small world" boat ride became a centerpiece of Disneyland in Anaheim, Calif., in 1966, and the famous song still plays in a continuous loop at "small world" rides in Disney parks.