I'm not a parent myself, but I have been trying to get my two nieces and nephew into music (specifically drumming as I teach lessons and would love to see them take it up) because it has huge social value, is fun, and above all else is a skill you can learn and develop for the rest of your life.
I would recommend not pushing it on young kids, but see where their interest lies. I have found that with young kids drums are easy because everyone likes to hit stuff!
Out of all the people I have ever met who have taken lessons and have quit their instruments is almost always due to feeling forced into it, and having it feel like work. Lessons need structure to be effective, but the lessons themselves need to be orientated around the students interests.
Anyways, good luck with the young'ns.