Kids discover ancient beast's bone

An 11-year-old from Michigan said he is going to really wow his schoolmates Friday with the "coolest" show-and-tell item anyone's ever brought to the sixth grade.

After all, it's not every day you get to show off a 13,000-year-old mastodon bone you and your cousin found in a stream behind your backyard.

"I thought it was a rock at first, but a couple minutes later I looked more at it, and I didn't think it was a dinosaur bone, but I wasn't sure," Eric Stamatin of Shelby Township Michigan told CNN on Thursday.

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