These kaleidoscopes are called teleidoscopes and made of cardboard & mirrors. This is not the traditional style with loose bits inside. It is a cylinder of mirrors inside and the clear lens at the end which creates kaleidoscopic images of whatever you are looking at.
Illustrations by Nathalie Ouederni
Each kaleidoscope measures approx 19.4 cm long and 3.8cm in diameter.
Assorted designs.