My daughter just celebrated her 4th birthday. She has shown an apttitude for music and an interest in playing instruments, especially the piano. My wife took dance lessons as a child and I have sung with various musical groups all my life, but neither of us plays an instrument. When should we look to enroll her in piano lessons?
When a child begins piano lessons really depends individually. Some are not ready at 4, some are at 3, some aren't until 6 or 7.
For sure if you choose to begin now, you have to make a commitment on your own part, since you will be helping and making sure she practices. She'll need lessons year round, because if you stop for too long she'll forget and have to start over.
I personally think piano is a great instrument to start learning on. Piano teaches you overall music so well, and it really develops pitch and skills that are very transferable in music later. Growing up my siblings and I were required to play piano until middle school, at which point we could choose to continue or we could learn a band instrument.
Know that your daughter can always learn something else if it isn't working.
So, is she mature? Bright? Focused? Interested?
Are you ready?
Then yes.
Get a good piano (not a keyboard, please!) and look around for a good teacher.