Making shadows

Testing the exhibit

An easy exhibit which shows the results of adding and subtracting the colours red, green and blue. 3 lamps; one for each colour, are placed about 400mm apart and aimed at the same spot on a white wall. As children pass through the beams, the projected light, which appeared white, suddenly shows multicoloured shadows.

Stern für Kids for Mercedes Benz at the 1995 Frankfurt motor show.