Art, Finland, Summer, Bookmarks

There is no description on this postcard, however, in small letters down the side is:

Kuurojen Liitto *Finlands Dovas Forbund* Katriina Laine - 99

it is postmarked with Finland stamp in 2008

What makes this postcard very unique is the fact that there are three panels to it. The window panes running vertical are perforated so the bend. I think maybe you are supposed to break them apart and make bookmarks??
Also, the sender (Minna) knew the card wouldn't make it from Finland to the US without breaking, so she put a used stamp on the back and addressed it to me and then put it in an envelope (with another great see-through Disney postcard ;-) and sent it. She knew I collect stamped postcards!! How wonderful!