We Came Here Because They Said We would have Fun.
When children reach a certain age, they start to think that they know everything and that they have a duty to use this knowledge to help everyone they meet. This is the exact same scene here in the post, the baby might have completely destroyed the strings of these instruments, and left it unusable.
Some more examples of this kind of indulgence are getting the family pet a new haircut or having mom’s expensive shoes cleaned by some paint brush or may be their parents’ tooth brush. When a young child was able to “help” their dad fix all of the “metal thingys” in their dad’s guitar, it was a priceless moment. After the job was done, the child could show their father and say, “See, Daddy, I helped!”