Evidence
There is a wealth of evidence to support playing music develops our brain. Studies have compared the educational improvement between students who take extra music, extra science, military style drills or a control group who do no extra-curricular activities; studies demonstrate that in just 6 months of playing an instrument there is a shift in educational achievement. Longer engagement with music provides sustained benefits. Below are just two examples from academic studies:
Music training supports and enhances the sensitivity to sound and the sounds of language (phonemic awareness) and this predicted student performance in reading letters and single words.
Long, M. (2014, Vol 36(1)). "I can read further and there's more meaning while I read": An exploratory study investigating the impact of rhythm-based music intervention on children's reading. Research Studies in Music Education, 107 - 124.
Length of music training predicted reading comprehension performance even after controlling for age, socioeconomic status, auditory perception, full-scale IQ, the number of hours that children spent reading per week, and word decoding skills.
Corrigal, K.A.,Trainor L.J., (2011) Associations Between Length of Music Training and Reading Skills in Children Music Perception: An Interdisciplinary Journal, Vol. 29 No. 2, December 2011; (pp. 147-155)