Ran across an interesting article that gives a helpful tips how to help children to get used to a "worship behavior" :) 

https://founders.org/2017/05/09/how-to-help-your-kids-in-corporate-worship/

The only thing I can add is kids WILL test your boundaries - they WILL do thing that you forbade them to do. Just - be prepared! As adults you might wanna discuss beforehand HOW are you going to react if this or that happens. Also, it is very helpful for you as a family when mom and dad present a "united front". Then kids will be less tempted to manipulate one of the parents into his/her "great ideas".