Just a quick question for the experts here, I recently came across a copy of "I Can Fly", but as a "giant sturdy book", which is like a traditional board book. As most of the book collectors I know are illustrators and designers, none of them had heard of this version -can you tell me any more about it? Are these versions trickier to track down than the older "normal" book versions?

1965 printing by my guess from the inscription to the child inside.