We don't usually try to tie Sunday School into worship unless there is a natural connection. Instead, we frequently use children's sermon time as worship and "about church" education time.
Just recently we used the Worship Banner Kit from Phyllis Wezeman & Anna Leichty - that was 12 weeks worth of children's sermons!
We do use the lectionary in worship, so sometimes I look to Carolyn Brown's books called "Forbid them Not" for ideas of how to make the themes of the worship service child-friendly.
From time to time the lectionary reading is about one of the stories we have ALREADY COVERED in a previous Rotation. That means I can ask them questions about the lectionary scripture, and it shows off that the rotation model is really working - when two years after studying the story in Sunday School, a child can accurately respond to questions about the story in worship!
Kim