Kalidescope is made up of three  rectangular mirrors strips each of 15cm long and 4cm wide join them toghther tofrom prism fix them in  a circular cardboard tube make sure that the tube is slightly  larger than the mirror strip close one of the tube by a cardboard disc having a hole in the center to make the disc durable paste a piece of transparent plastic sheet to cardboard disc at the other end to touching the mirror fix a circular plane glass plate  place some broken piceces of bangles on the glasses  plate close this end of tube and allows  enough  space for the  bangle pieces to move around.