What happens if my child quits after a few months?
Then you return the instrument. That is the whole point of renting instead of buying, it happens in every school year, and nobody here will make it awkward.
One thing we ask, sincerely: tell us what is actually going on, because “quitting” is usually something more specific, and the specific problem often has a better answer than walking away. Switching to a different instrument? That is an exchange, not an ending, and we handle those constantly. Moving away? Braces making the trumpet miserable? A saxophone that turned out too heavy to carry? Each of those is a different conversation with a different solution, and we have had every one of them a hundred times.
As for the money side of an early return: it is case by case, and we mean that as a feature, not an evasion. We are a family shop, and we would rather hear your situation and work it out like people than read you a paragraph of contract language. Families who talk to us are consistently glad they did.
So before anything gets returned, one phone call. Worst case, you return the instrument and that is that. Best case (and it is the more common case), the problem turns out to be solvable, and a student who was about to quit music simply needed a different instrument, a different size, or a month of patience.