Using only his bare hands and wooden eyes for puppets, the non-verbal "Lejo" shorts were first seen on Sesamstraat in 2003. Lejo also appeared in the special Open Huis in Sesamstraat. The character he uses the most on Sesamstraat is a "finger puppet" named Mano. Besides his work for Sesamstraat, Leo Petersen has his own one man show, "Handywork".