Using these stackable school chairs is a breeze. Just place them wherever you need seating, like in a classroom or a playroom. They're easy to move around because each chair only weighs 13 lbs. When it's time to store them, you can stack up to 10 chairs together to save space. As for safety, since there are no metal parts, you don't have to worry about your kids getting hurt. However, make sure the load on each chair doesn't exceed 286 lbs to keep them in good condition. To maintain these chairs, simply wipe them down with a damp cloth. Avoid using harsh chemicals as they might damage the polypropylene shell. If you notice any signs of wear and tear, it's a good idea to replace the chair to ensure continued safety and comfort for your little ones.