Ava Lin, super-duper happy

"Ava Lin is in first grade, and she's really good at dancing, making up games, and finding treasure. This week she's super-duper excited, because it's going to be the best week ever. First, her popo -- Chinese for grandmother -- is coming to visit, and Ava can't wait to show off the special acorn, button, Post-it note, hair clip, and inside part of a marker that she found on the school playground. And second, this Sunday is the school walkathon....