Your brother Oliver, of course!
As soon as Ethan discovered a few weeks ago that he was assigned share day for the letter O at preschool, he knew exactly what he wanted to bring for share day and was asking us to do so. Okay, he was adamant about it and Oliver was undeniably excited to be his brother's share as well. How can you not accommodate that?
Today was that O day. Erin brought Oliver into the classroom right before lunch. She said Ethan said all matter of fact: "This is my letter O share, my brother Oliver." From the photos I can see they were both beaming, just as I knew they would be.