Puppets & Things on Strings' Mark Hellerstein is a Denver, CO based comedic entertainer specializing in ventriloquism and puppetry. He has been bringing smiles to adults and children alike for over 40 years. Serving the Denver area, Puppets & Things on Strings specializes in offering entertaining programs that combine comedy, theater, motivation, and audience participation for a wide range of events, including birthdays and anniversaries, camps and scout groups, churches, schools and libraries, conventions and corporate events, country clubs and more. Call today to book Mark for your next event!