Music Kit is designed to cover all the likely instrumental combinations found in schools. Each set comprises of two of each of the following parts:1st C Melody2nd C MelodyB Flat MelodyC HarmonyB Flat HarmonyE Flat And F InstrumentsEasy B FlatEasy Violin/ViolaPiano/ConductorGuitarBassPercussion 1 & 3Percussion 2 & 4Music Kit can be played by any number of instruments in any combinations on the principle that one melody part and the Piano part are essential and all others optional.