Beadhoppers Interchangeable Jewellery for Bead Makers and Bead Lovers. The Beadhopper Interchangeable Jewellery System is an ingenious way to turn your favourite bead into gorgeous and showstopping piece of jewellery. The Necklace has a 'Ready to Wear' principle and the Pendants has the 'Stack and Screw' principle. Both you can change your bead in the blink of an eye.