I sent my cousin a link for a lovely acorn necklace off etsy the other day, and our friend sent us this lovely little bit:

Wendy asked Peter Pan for a kiss but he'd never heard of a kiss. He gave her an acorn instead. She took it and kept it close to her heart. One day, the Indians shot an arrow at her, and instead of shooting her through the heart, the arrow was stopped by the acorn and it was just as a good as a kiss.