Are you old enough to remember View Masters?
The official Wikipedia definition is this: View-Master is a device for viewing seven 3-D images (also called stereo images) on a paper disk. Although the View-Master is now considered a children's toy, it was originally marketed as a way for viewers to enjoy stereograms of colorful and picturesque tourist attractions.
Well, now that I'm older, this is MY kind of View Master: this is called a View Master card. I sent this to my niece and nephew for Halloween. They can see 6 different images by turning the "wheel" on the side. This was a really fun card to make. I used a retired set for the images, but the set Spooky Bingo Bits would work great, or Jolly Bingo Bits for a Christmas View Master card.
HAPPY HALLOWEEN EVERYONE!