As the voice of a parent, I want to share that you're not alone in having children who push back about music lessons this time of the year.  Hang in there.  My own children are resisting lessons and practice!  

My advice?  Keep it light - resist pushing too hard.  Children are tired of structure right now and are feeling generally burned out.   I choose this time to switch up the music lesson routine a bit.  The goal is not to stop lessons entirely over the summer. Parents, you'll hate me for saying this...but if you are committed to music being part of your child's life - its a year round activity.  Music is like a foreign language.  When you cease the weekly exposure over an extended time, children take enormous steps backwards.  Many of them never get back into it because its too discouraging to relearn what they know they learned before.  I encourage you to resist this approach.  Rather, work with your instructor to create a less routine program in the summer..one with flexibility....that is less rigid and just keeps your child interested in music.  We all need a change now and then. 

Don't get me wrong, breaks are important and every student should take a break periodically.  I am encouraging 3 weeks off over the summer whether all at once or one week at a time.  The other weeks, we'll be playing music and having fun at it.  No Summertime "blues" allowed around here!