Buckeyes

Back in the Buckeye State, natural buckeyes strung into necklaces abounded in stores and craft fairs everywhere. Sadly, we never ended up purchasing any. However, we've been granted a second chance: here in Utah, our neighbor has a buckeye tree, and Amanda has been diligently collecting them on her way to and from school this week. Anybody know a good way to pierce buckeyes for necklaces? :)