Vintage folding plastic Weetabix Vistascreen 3D picture viewer with 44 original cards.
The cards are made from card and have animals and classic cars images. Each card has a description of the image on the back. Place a card in the slot and view it through the two lenses to see the picture transformed into 3D. 
In good vintage condition. Please see photos for more details.
Dimensions (folded):
Width: 115mm (4 1/2”)
Depth: 80mm (3 1/6”)
Height: 12mm (1/2”)
Weight (including cards): 87g