Fisher Price View-Master
Did you know that the View-Master was first invented back in the 1930s? Originally it was pitched as an alternative to the scenic postcard (a 3D collection of images from your destination), but over time, it became more known as a children's toy - with images to match.
The 3D images are just a clever manipulation of two images - viewed together, they fool the eye into seeing the depth. If you don't believe me, you can find out for yourself as the View-Master, now owned by Fisher Price, is still available to buy.
The View-Master retails for around $8 online (that's just £4.25), with discs available for around $5 per set (around £2.65). An inexpensive design classic that's sure to give you and friends plenty of enjoyment.