If kids are having trouble settling in for meditation, it might be helpful for them to identify where they carry their "quiet space" inside. This can be done in conjunction with identifying where they also carry other feelings within their bodies. Younger ones (some older ones, too) may get a kick out of having their bodies traced (life size) on sheets of butcher paper and then "mapping out" their feelings within their bodies. I have done this with children, using color as the way of visually differentiating between feelings (excited, happy, sad, angry, etc. leading up to quiet or calm or peaceful). I have also had them identify where they go for quiet time, and used this visual image with them, doing some guided imagery about the place, its sounds, smells, colors, etc., so they can picture themselves there before beginning the reading for meditation.