Children who survived last month’s shooting rampage at Connecticut’s Sandy Hook Elementary School have recorded a version of “Over the Rainbow” to raise money for charity.

Twenty-one children from Newtown, Conn., sang the song Tuesday with singer-songwriter Ingrid Michaelson on ABC’s “Good Morning America.” Most of them are current and former students of the school where 20 first-graders and six staff members were killed.

They recorded the song at the home of two former members of the Talking Heads rock band. It went on sale Tuesday on Amazon and iTunes, with proceeds benefiting a local United Way and the Newtown Youth Academy.

Ten-year-old Kayla Verga says she’s singing for her friend, Jessica Rekos, who was killed in the rampage. She says it feels like Jessica is beside her, singing along with her.