More beginners quit over equipment than over ability, and almost none of them know that's what happened. This is the short version of what to check.
Reed strength
Reeds are numbered by hardness, and beginners are routinely sold ones that are too hard because a harder reed sounds better in the hands of somebody who can already play. Too hard for a beginner means no sound, a sore face, and a reasonable conclusion that they're not musical. Starting soft and moving up as the embouchure develops is the whole trick.
Reeds die
They're a piece of cane and they wear out. A reed played daily lasts a few weeks, and the decline is gradual enough that players don't notice it. They think their playing has gotten worse. Rotating between a few reeds rather than playing one until it dies extends all of them and keeps the sound consistent.
A chipped tip, a warped surface, or a reed that has gone soft and buzzy is finished. Playing on it is practicing a problem.
The mouthpiece
The mouthpiece that arrived with a student instrument is usually the weakest part of it, and replacing it's the largest improvement per dollar available to a beginner, bigger than a better instrument. It's worth doing before anyone concludes the instrument is holding them back.
What it's not worth doing is buying a professional mouthpiece for a beginner. Those are built for players with a developed embouchure and they make a beginner's life harder, not easier.
The rest of the kit that matters
- A swab. Used every time. Moisture left inside is what ruins pads, and pads are the expensive repair.
- Cork grease. Forcing a dry joint is how instruments get bent.
- A reed case. Reeds kept loose in a case warp and die early.
What parents should check first
If a child suddenly sounds worse for no reason, it's the reed or the instrument, almost every time. Before concluding anything about talent or motivation, bring it to a lesson and it gets checked. That's ten minutes and it has saved more students than any amount of encouragement.
Lessons are in person around Cincinnati, Covington and Newport, or online, with the rates on the pricing page. Choosing a first instrument covers what to buy in the first place.