Jan Rosenthal is a University of Connecticut graduate in Puppetry. In 1978, Rosenthal began working at Henson as a puppet builder and designer.
Rosenthal left Henson in 1987 to pursue a career in toy design and was hired by Fisher Price. Today she is a freelance toy inventor and designer.
- The Muppet Show - built Lottie Lemon and her Singing Wig, clams, and other major characters
- The Muppets Take Manhattan- Muppet design and construction
- Fraggle Rock - Muppet designer
- Follow That Bird - built Mommy Dodo
- Little Muppet Monsters - built Boo Monster
- The Christmas Toy- built Apple and Mandy
- Tale of the Bunny Picnic - built "Dop-De-Diddly-Dog Bop"