Jan Rosenthal worked for Jim Henson as a puppet builder and designer, beginning in 1978. She graduated from The University of Connecticut's Puppet Arts Program.
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
- Sesame Street - Muppet designer for Season 10
- The Muppets Take Manhattan- Muppet design and construction
- Fraggle Rock - Muppet designer, built Mokey Fraggle
- Follow That Bird - built Mommy Dodo
- Little Muppet Monsters - built Boo Monster
- The Christmas Toy- built Apple and Mandy
- The Tale of the Bunny Picnic - built "Dop-De-Diddly-Dog Bop"