Do you have kids at home who hate to come inside even when it gets too dark to see? Maybe you have Ultimate Frisbee fanatics or just someone who loves cool light-up toys. If you said yes to any of the above then you need to check out Lumi-Niter. This unique take on the Frisbee features four spots to insert glowsticks (Xtraordin Air provides 16 in the package) that light up the night and create really cool patterns when it flies. The disk itself is made from durable plastic with a textured surface that makes it easy to grip and throw. Since there are no batteries, there is no imbalance issue. However, you should understand that glowsticks, once activated, will only last a day or so. These are generic sticks that can be purchased at any toy or party goods store. The glowsticks easily slide into their holders on the top of the disc. They fit securely, and had no reports of them ever falling out or getting lost. Swapping them out for new ones was a snap.