I am sure before the summer started, your kids already looking forward what music instrument they would like to learn. My kids always open up what they like during dinner, especially when I am the one cooking. When we gather on our dining table and started eating, they told me what they like during summer, my eldest daughter was already so sure what she likes but my youngest daughter was having a hard time so I let her check some lists in the Internet after dinner, afterwards she was able to know what is right for her.
Nevertheless, I guess you experienced it too, oh well the wwbc.com educational is here to help us decide, it would help saving our arguments with our kids during dinner because this alone can help them decide what music instrument they would pick up. Try it and I am sure you learn a lot too.