I always wanted my kids to be interested in music. It’s an important part of my life, and I have a number of instruments around the house. I might have a few “toys” but I always felt that if you want your kids to be interested, they have to have access to serious instruments that they have to learn. Then you have to spend time with them, pretty much learning the instrument along with them.
If you’re not completely engaged in the music with them, they won’t feel it is important to you. If it’s not important to you, it’s harder for them to see why it should be important to them.
My son and I do have some differences about practicing. He wants to practice when he wants to (which is usually when it is late and he is tired) and I want him to practice when he is fresher. Also he likes to do the stuff he loves first, and I want him to do the stuff he doesn’t like first, so he can reward himself with the stuff he loves at the end. It is an ongoing tug-of-war.
Anyway, I don’t think we can expect our children to be interested in music unless we are interested in it, and especially demonstrate that interest by spending at least half an hour a day with them working on music. There are a few people who will do music no matter what their parents do. But for most, parents need to support them or it ain’t happening.