While four years old is a little young for formal guitar lessons, it's not too early to begin teaching your child musical concepts that will be important once they are old enough for guitar instruction at School of Rock. Your 4-year-old can participate in the Little Wing music program to learn fundamental concepts through fun, dynamic musical activities. 
When all is said and done, the only way to know for sure what a certain set of strings will sound like on your guitar is to take them for a spin. For that reason, it's not a bad idea to try out a few different ones that interest you to see which ones you like best - then you can stock up! However you like to approach your string shopping, the amazing selection you'll find here is sure to satisfy.
First off, there are two more techniques I want to talk about. These are fret placement and finger posture. Place your first finger on the first fret of the B string. For fret placement, you’ll want to have your finger right behind the fret. In the video, you can see that the further away from the fret I place my finger, the more buzz the note has.
In 1977, the Guitar Institute of Technology (GIT) revolutionized contemporary music education with the first full-time program to offer hands-on professional training for the electric guitarist. Over three decades later, MI remains the leader in guitar education, besting other colleges for guitar players, with a unique system that combines technical, creative and professional development in a performance-based program.