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The name "SiniaN" comes from the Sinian period, a geological age name, which is a period in the late Proterozoic era. In Chinese, the name (Zhen Dan) reflects the meaning of vibration and egg. The design inspiration for the product comes from the keychain. If you have a habit of unconsciously tossing the keychain around your finger when holding a set of keys in your hand, you will love it. About the Youth Edition The functions and gameplay of the Youth Edition are exactly the same as the previous edition. The feedback on hand feel and sound is excellent. The differences are as follows: 1. In order to reduce costs, the Youth Edition has made some structural adjustments. This has resulted in some extension accessories not being compatible with the previous edition.2. The Youth Edition does not have two 3mm screw holes, so spikes or spinner caps cannot be installed on the Youth Edition.