My brother plays guitar, I have a guitar and so do both of my children. One thing that always comes in handy is new strings. Lets face it, they break, they can stretch out and they simply need replaced once in awhile. So since my brother was very young we have always put new strings in his stocking for Christmas, knowing he would use them. Morrell Music has a great selection of strings over on Musicians Friend. If someone you know plays any instrument that requires strings then I strongly suggest getting them for the stocking!! Nothing better than getting something you will use as a gift!!