Folk musician, carpenter, film maker and sometimes puppeteer, Jonathan Frith (Michael K. Frith's son) was a member of the Muppet family from the age of five, when his father, Michael Frith, joined ha! Something of a "Muppet Rat," he spent countless hours playing with the puppets, hanging out in the Shop, on photo shoots and generally annoying Designers, Puppet Builders and a tall fellow named Jim Henson (who had an office upstairs).