Ben and Leo Sidran's 'El Elefante' Ben and Leo Sidran release their new children's CD El Elefante. The collection of original songs is in English and Spanish. Father and son started working together when the son was a child, and the collaboration grew from that. Ben is more jazz influenced; Leo is more pop- and rock-oriented. The two talk about the fun they had creating the music with NPR's Melissa Block.