Frosty the Snowman

June Foray voiced all the children for the original broadcast, however beginning with the third broadcast in 1970, her voice was later shown overdubbed with two unknown child actors (one voicing Karen, and the other voicing two of the boys). This was likely done for the authenticity of hearing real children. However, June's voice is still heard for most of the children's additional dialogue, several extra lines, the teacher, and most of the singing.