Hi Mark,
I agree with Julius. With my daughters while they were growing up, we would read the Bible and it seems like the Holy Spirit always gave insight and I would get sort of dramatic. Then they would get the Word in them. I wish I had them memorize more but we did sing scripture songs.
I have worked at Christian Bookstores in my life and kid's devotionals in my family never seemed to work. I don't know why. Now, it might be good to do a Bible app, but it just has to be the Lord leading you. I wish my husband had been more involved, but he wasn't.
Corrie Ten Boom's father as she wrote "In My Father's House" gathered everyone around the table to pray and read the Word. Corrie loved every minute of her Daddy reading the Word out loud.
Hope that helps a little.
May God help you bring up your little ones in the admonition of the Word.
Sis L