In 1988 she designed costumes for the 20th Anniversary of RBBB Clown College. She also designed costumes and props for the 1988 Edition of the Gold Unit of RBBBC that toured Japan.
In 1989 she established Pricilla Mooseburger Originals (PMO), a clown costuming company. She revolutionized the market by encouraging individual custom designs, and consequently encouraging individual clowns to new things. She has built costumes for clowns on every major American circus, and quite a few of the smaller shows. She has become one of the best-known clown costumiers in the country. She has made it possible for clowns all over the world to have high quality costumes, make-up, wigs and books to help them advance their clown performances.
In 1994 she started Mooseburger Clown Arts Camp to offer the ultimate interactive clown arts educational experience. The dream of Moose Camp was and is to teach the fundamentals of clowning through a variety of mediums in an effort to help people move on to another level of clowning. She also believed in preservation of circus routines and adapted them to be shared in every program she hosted. Because of her efforts, in partnership with Frosty Little, old circus gags are still being taught, and preserved and performed by the students who attend Moose Camp. Over a thousand clowns from all over the world have attended Moose Camp programs. Tens of thousands in the U.S. and abroad have attended Tricia’s classes and benefited from her generous style of teaching. She has brought in students from most every continent on the globe to join and study the art of clowning.