As you live out a Christ-like example for yours kids, you need to begin some sort of family devotions. How do you start this?
And these words, which I command thee this day, shall be in thine heart: And thou shalt teach them diligently unto thy children, and shalt talk of them when thou sittest in thine house, and when thou walkest by the way, and when thou liest down, and when thou risest up. And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes. And thou shalt write them upon the posts of thy house, and on thy gates.Deuteronomy 6:6-9
There are several very easy things you can do to begin. First, pray with each of your kids before they go to bed or have a family time of prayer before you start each day. Although this is relatively simple, it opens the door for more in depth things.
Another easy way to begin is to set aside time each Sunday to discuss what each member of the family learned during worship. This will open many doors for discipleship and instruction. It will begin to make each member of the family comfortable discussing spiritual things.
The main thing you must do is make spiritual conversations, Bible discussions, and prayer normal things.
As your family becomes used to these spiritual things being a part of your routine, you can begin to add more things. I would recommend beginning with just a simple devotional. Many devotionals are simple and convey one little simple thought from Scripture. As you and your family grow, you can then begin to have simple discussions around what was read. You can have each child take a turn reading.
Once your family is comfortable with a devotional, you can begin to expand your family worship time. This might be reading through a passage of the Bible and discussing it. It might be memorizing Scripture together. You could go through a catechism together. The possibilities are endless.
And as they heard these things, he added and spake a parable, because he was nigh to Jerusalem, and because they thought that the kingdom of God should immediately appear. He said therefore, A certain nobleman went into a far country to receive for himself a kingdom, and to return. And he called his ten servants, and delivered them ten pounds, and said unto them, Occupy till I come. But his citizens hated him, and sent a message after him, saying, We will not have this man to reign over us. And it came to pass, that when he was returned, having received the kingdom, then he commanded these servants to be called unto him, to whom he had given the money, that he might know how much every man had gained by trading. Then came the first, saying, Lord, thy pound hath gained ten pounds. And he said unto him, Well, thou good servant: because thou hast been faithful in a very little, have thou authority over ten cities. And the second came, saying, Lord, thy pound hath gained five pounds. And he said likewise to him, Be thou also over five cities. And another came, saying, Lord, behold, here is thy pound, which I have kept laid up in a napkin: For I feared thee, because thou art an austere man: thou takest up that thou layedst not down, and reapest that thou didst not sow. And he saith unto him, Out of thine own mouth will I judge thee, thou wicked servant. Thou knewest that I was an austere man, taking up that I laid not down, and reaping that I did not sow: Wherefore then gavest not thou my money into the bank, that at my coming I might have required mine own with usury? And he said unto them that stood by, Take from him the pound, and give it to him that hath ten pounds. (And they said unto him, Lord, he hath ten pounds.) For I say unto you, That unto every one which hath shall be given; and from him that hath not, even that he hath shall be taken away from him. But those mine enemies, which would not that I should reign over them, bring hither, and slay them before me.Luke 19:11-27
Remember that it is faithfulness that brings about fruitfulness. Do not expect to have a two hour worship service every night when you begin. Be faithful in the little things and God will bless them and cause them to grow. Don’t worry about some big or elaborate plan. Start small and let God steadily grow it into something more. The most important thing is to be consistent.