Thank you for sharing your collection! It is fun to see all the older covers. That Shaun Tan Arrival A6 is a Unicorn of mine. It's so neat and I love the book's story. I have the Shaun Tan Eric cover on cover at least!
Astro Boy is the pencil board name you were looking for. Loved seeing your collection. Hide and Seek clear cover is my absolute favourite, I've the weeks one. It split and I literally cried but it taped up ok.