Liturgical worship for children is not about "keeping still" or "staying quiet," but rather about experience and immersion. Liturgy is a physically and spiritually demanding participation sport. We don't just sit there, feel good, and absorb the vibes. I don't mean this as a criticism of your position, just as an illustration. The ethos of Orthodox worship is quite different from that of Protestantism or even modern Roman Catholicism. If you can find a church without pews, this may be easier. My godson, who is 5 and rarely does anything I tell him, will spend most of the service rolling around on the carpet like a lazy walrus. One thinks he's picking up nothing, but just as children hear and repeat stuff you say at home (however much you might not want them to), so they do the same at church. Practice and participation at church and at home are key. Don't think about "quality time," think about consistency, intention, repetition. The little lazy walrus is also capable of saying his prayers, lighting candles, and wanting to participate--but he participates at his level--the level of a five year old boy. Parents participate also at their level--the level of parents whose primary job is raising children. It's like a monastic obedience. Just as some monks have to cook while the others are in church praying, parents of small children often have to miss some of what goes on in the service because they're taking care of children. But, this is a good and blessed thing. Others are praying with them. In my church, others even have a rotation of picking up babies and carrying them around in church--in the back where it's not so distracting. We think that we become closer to God by some great mental/spiritual effort, but it is God who sanctifies, not we ourselves, and He is in the habit of doing great things for those who do "little" things, like take care of their children, even if they sacrifice listening to a reading, hymn, or sermon. They still keep God in their hearts and pray from their hearts as they are trying to calm down a whining child.