He has created set designs acronyms/logos for RAI, and worked with Federico Fellini on La voce della luna.
In July 2008, he completed a polychrome installation "Balançoires sans Frontières" (Altalene senza Frontiere) in Castasegna, Switzerland.
[5] In 1984 Serafini illustrated Pulcinellopedia (piccola), under the pseudonym P. Cetrulo (published by Longanesi), with a suite of pencil drawings about the Neapolitan masque of Pulcinella.
This book features numerous pockets containing leaves of fantastic plants printed on heavy paper stock and die-cut to leaf shape.
Other unpublished works and illustrations are reported to exist, but aside from the occasional exhibit of art (from clay figurines to plastic and polychrome sculpture to furniture and small installations), they are not available or publicly catalogued.