I was just looking online for an object lesson to go with my lesson tomorrow on Scripture reading, and I came across this. I think it would fit your lesson nicely.
It's from this website:
http://www.jennysmith.net and then click on the object lesson link and search for your topic
Brief Description/Purpose:
A twenty dollar bill doesn't loose its value, and neither do children of God.
Objects Used/Preparation:
a twenty dollar bill
Lesson:
A well-known speaker started off his seminar by holding up a $20 bill. In the room of 200, he asked, "Who would like this $20 bill?"
Hands started going up.
He said, "I am going to give this $20 to one of you, but first, let me do this."
He proceeded to crumple the dollar bill up. He then asked, "Who still wants it?"
Still, the hands were up in the air." "Well," he continued, "what if I do this?"
And he dropped it on the ground and started to grind it into the floor with his shoe. He picked it up, now crumpled and dirty. "Now, who still wants it?"
Still the hands went into the air.
"My friends, you have all learned a very valuable lesson. No matter what I did to the money, you still wanted it because it did not decrease in value. It was still worth $20."
"Many times in our lives, we are dropped, crumpled, and ground into the dirt by the decisions we make and the circumstance that come our way." We feel as though we are worthless. But no matter what has happened or what will happen, you will never lose your value: dirty or clean, crumpled or finely creased, you are still priceless to those who love you." Keep this in mind: The worth of our lives comes not from what we do or who we are, but by whose we are!
You might use 2 Corinthians 4:18: "While we look not at the things which are seen, but at the things which are not seen: for the things which are seen are temporal; but the things which are not seen are eternal."