Love the noise
Encourage your children in their early attempts to play an instrument. Avoid wincing and covering your ears. If you are positive, you should be rewarded with rapid improvement and sooner or later, some tolerable music.
Make practice easy by creating a music corner where the instruments is readily available (preferably out of its case), with a clutter free area for scores and equipment a music stand and in needed. A comfortable seat, adjustable to the correct heights. A short practice daily, as a regular time is considered by most music teachers to be the best routine.
Leave the masses of time to get to a concert or show in which your child is performing, don’t make a big deal of the event. Children quickly pick up parental tension and anxiety. Pre-performance nerves.
Remember to check that any instruments you hire or borrow are adequately nerves.
Be a beginners together. Why not start a class or course at the same time as your kids so you can lear alongside them?
Teenagers in particular can benefit from having their parents on a level playing field, and it can be tremendously bonding to discover a new shared interest.
Give them your camera to see how your kids snap photos, too! They might be good at taking photos in the future!