Mini Slide Projector
Ages: 8+
When light from the projector is shined through specialized photographs (AKA slides), it enlarges the photograph on the slide and displays the image on a screen or wall.
Inside the projector are several lenses that it uses to project parallel rays of light through the slide. While this is happening, a lens on the other side of the slide spreads the light rays back out, enlarging the image. That is where the focus feature of the lens comes in handy, in order to make each projected image sharp and clear. The size of the image can be adjusted by moving the projector further from or closer to the wall or screen it is projecting on.