I used these cabochons to make an advent calendar. The magnets are very strong and don't seem to pose any risk of falling off the metal tree to which they are attached. Since the cabochons are glass I tried to avoid sticking together and instead stored them so they wouldn't roll around in a small metal bucket To turn the chunky cabochons into jewelry I colored heavy paper red or green, the cabochon with a pencil circled and drawn numbers in the pencil marks and also added an extra layer to the back of the paper. After drying I used superglue to attach a magnet.
Pack Of 12 MIKEDE Neodymium Bar Magnets - Strong Rare Earth Metal Magnets With Double-Sided Adhesive - 60 X 10 X 3 Mm Size
41 Review
50Pcs Strong Neodymium Magnets With Hole & Mounting Screws - Heavy Duty Rare Earth Disc Countersunk For Locker, Tool Storage & Crafts
31 Review
MIKEDE 8-Pack Powerful Neodymium Magnets With Double-Sided Adhesive - Ideal For Fridge, Crafts, DIY, Science, Building & Office Projects - Rare Earth Magnets For Strong Grip
39 Review
MIKEDE Strong Neodymium Disc Magnets, 16 Pack Powerful Permanent Rare Earth Magnets With Double-Sided Adhesive, Fridge, DIY, Building, Scientific, Craft, And Office Magnets, 1.26 Inch D X 1/8 Inch H
40 Review