There are many Biblical truths that teach us that we are valuable. That we are important to God. That we matter. But most people don't start making those connections until they are much older. I know I didn't.
For children, the #1 place that they will learn that they have worth is from their parents. Nobody else can instill this within them like mom and dad can. And it happens powerfully at home, even at an early age.
Donald Miller writes about this on his blog. I love what he says. It's a simple reminder of something we all know well but that we easily forget in our busy lives.
You can read his brief post here.