 In 1986, Leck formed the Indianapolis Children's Choir which has toured internationally with much acclaim.Leck has conducted festival choirs in nearly every state in the U.S., and has led many international children's choir festivals, including the Musica Mundi Tuscany Children's Choir Festival in Italy, the Central European International Children's Choral Festival, the International Children's Choir Festival in Beijing, China, the Vienna Children's & Boys Choir Festival with the Vienna Sangerknaben, and the KI Concert Spain Festival.He recently conducted the Tokyo International HS Honor Choir in Japan.