Chipped teeth are extremely common in young kids! If there is no damage to the root, as you said, a composite bonding will be a great option for her moving forward. I don't see how playing the Clarinet would be a problem once the tooth is fixed with composite. Composite bondings can be made to look and feel just like a natural tooth, which is why they are perfect for situations like this. Assuming she is careful, she should be able to get an average of 5-7 years out of the bonding. When I say careful, I mean she should avoid biting into hard foods, never use her teeth as tools, and wear a mouth guard when playing any contact sports. If you find that the bonding doesn't last a long time, you should wait until after she is finished growing to complete a permanent restoration (i.e. cap/veneer). Generally in women, growth is completed between 16-19 yrs of age. Between the age of 13 and 19, your daughter's gums and mouth will be constantly changing, which is why you want to wait to place any final restoration. She may also want to consider have orthodontics completed to get the teeth properly aligned before placing a final restoration. Hope this helps you.
You have what is commonly referred to as a diastema between your front teeth. Sounds like you have already been presented with two viable options. The fastest and cheapest treatment for your gap is to go ahead and get the composite bonding. This can be completed in one visit, and when done properly, should last you at least 5-7 years. The two other additional options you have are either orthodontics or porcelain veneers. These alternatives are excellent choices, but they will take longer and be more expensive. Best of luck to you!