I knew I wanted to make our own "beach bottle" while we were on vacation a couple of weeks ago. I bought a plastic bottle from Hobby Lobby for $1, a set of funnels and sticks (which proved to be unnecessary) and brought an address label to write the reference Psalm 139:17-18 on it.
One of the boys' favorite things to do while we were there was collect the tiny shells that washed up on the shore. We spent hours looking for and collecting them.
We read Psalm 119:17-18 and talked about how God has more thoughts than we could ever count. Isaac's hands were covered in sand. I told him to count how many pieces of sand were on his hands. He said, "I can't. There's too many." Exactly!
We were sitting on the balcony of the condo and I told him to look out at all the sand and imagine how many pieces there must be out there. We talked about how God has more thoughts than that and how smart He is and how powerful He is.
We took the bottles and filled them about half way with sand. Then the boys dropped a few of the small shells they had found down into their bottles.