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Well, my answer may not help your original question, but I hope it gives you an idea.

When my daughter wanted to cash in our change jar a couple months ago, we had her roll it herself. We picked up the supplies, and showed her what to do. It took about a week, but we changed it in for about $300, and she felt she'd done her part.

But then again, she's only 7 years old, so she's at the ripe age to teach her lessons like that.