This is what I'm fairly certain is the original release of Wham-O's super-cool toy.
I really dig the woodgrain on the back of the packaging. That's so perfectly 70's. It would appear that this packaging only lasted that first year, as they quickly rolled out the descriptive back the very next year.
Note the "Microdium" sticker on the celo. This one is still shrink-wrapped and is one of my faves.
I'm put together these scans of my Magic Window collection as the internet is decidedly sparse of information regarding these neat toys. I'm hoping to find the missing pieces to the puzzle.
For instance, I am nearly certain that Wham-O released a Bi-Centennial Magic Window, though I've never seen packaging for one. I did see a loose Magic Window that seemed to contain red, white, and blue sand. Which is where I got the idea.