Complex sentence: The collection contains costumes and props, as well as a reference library, and is home to the Clown Egg Register, an archive of painted ceramic and hen's eggs which serve as a record of individual clowns' personal make-up design.
Split into simpler sentences: The collection contains costumes and props, as well as a reference library. The museums are home to the Clown Egg Register, a collection of painted ceramic and hen's eggs which serve as a record of individual clowns' personal make-up design.