Personally, scrying scares me. I rarely do it. I have enough trouble coping with NOW.
First set up a protective circle. This is to prevent uninvited guests of ectoplasmic origin, i.e., “ghosties and ghoulies and long legged beasties and things that go bump in the night”. To do this, you will need:
Cast your circle, smudge or spritz and light a white candle at each direction. Invoke Deites, such as Hecate, Grandmother Spider, or any other of the Crones that control destiny and ask that they act as “gatekeepers” for protection.
Sit within the circle with your child and get comfortable. Your child can sit on your lap, on a chair, stool or on the floor.
Look together into the scrying tool. You don’t need to be quiet. You can discuss what you see. Talking helps to keep the concentration focused. If you find you have exhausted the child’s patience, banish the circle and try it again another time. After children have seen something for the first time, you will find their attention span will increase considerably.
Scrying is not a game. Tell the kids not to do this without adult supervision. They will do it without your supervision anyway. They will either scare themselves out of scrying altogether, or become very powerful seers.