This small manufacturing affordable stereo viewer was manufactured by Kenner Products Co. between 1964 and 1969 in red or blue plastic. The visor is extremely light in its construction but it works very well. The cards are inserted through a slot and manually lowered for each scene. The slides were made of very thin card that allowed the light to pass through them, so they could be seen. The stereo effect of these slides cartoon is quite effective. There was no light diffusers because they were not needed because the slides effectively spreading the light.