My First Film Projector
What is the physical principle underlying the toy?
Optics - lenses - film.
What age group is the toy designed for?
This toy is intended for children ages 6 and older. All parts are plastic which is both produced inexpensively and durable for aggressive play.
How does the toy work? How do children play with the toy?
Inside the removable cartridge, a series of film is mounted on a spool in a single loop. When the child holds the toy up to a light source, light passes through the film and adjustable lenses and displays the image. The child then turns the hand crank on the side of the viewer and, much like an old film projector, the "movie" is played.
Where did the idea for your toy come from?
The idea came from a childhood toy of mine.