Unfortunately it is too big to fit in a school bag but the CTK-240 is the ideal starter instrument for all beginners. The CTK-240 comes with 49 standard keys (four octaves) and is perfect for combining fun with serious learning. 100 timbres, 100 rhythms and 50 songs all lend themselves to instructive music lessons. Where the music is! Even the design of the CTK model is extremely impressive: slimline, slender and black - it is a beautiful piece of technology.