4 sound discs (4 hrs., 15 min.) : digital ; 4 3/4 in.
Read by William Dufris.
Produced by Bruce Coville and Daniel Bostick ; incidental music by Todd Hobin.
New friends Nilly and Lisa help eccentric professor Doctor Proctor develop his latest invention, a powder that makes one fart, making them very popular at school, but someone is planning to steal the industrial-strength formula for evil purposes.