Sand in trays

We had a station several weeks ago where we used 5 small black plastic trays about 1/2 inch deep and maybe 6X8 inches. We filled each with some colored sand and had a small (bigger than a toothpick) dowel with each. We included instructions at each directing participants to play with/move the sand & ask God to speak to them. The sermon topic was Mission (Movement, Action, Risk) & they should just work w/ the sand & pray.