"The BOB 3942" synthesizer is an object introduced in The Sims 2: FreeTime. It can be used by children and up. Using it builds creativity, and enthusiasm for the Music and Dance hobby. The synthesizer has its own interactions. Sims can practice on it, or can perform random tracks. Sims with higher creativity can create custom tracks, which they can save and perform. Unlike other musical instruments in The Sims 2, a synthesizer can break, and must be repaired. Sims are also able to tinker with it. The name "BOB 3942" may be a reference to Robert Moog, the inventor of the Moog synthesizer.