Cool Maker Stackd Heishi Bracelet Studio. Create colourful jewellery with the Cool Maker Stack'd Heishi Bracelet Studio. A beading pen helps pick up and stack the small Heishi beads into a chosen pattern, while the studio guides the design onto its string and clasp. Experiment with colour combinations, add a feature bead and make an accessory that reflects a favourite style. The kit offers a practical starting point for children who enjoy craft projects and making small gifts for friends. Enjoy choosing a design, trying a different approach and making the activity your own during a relaxed creative play session.