God pinched me a thousand times, and I was like first love to God. The concept input at the beginning of this case can be described as unconstrained, with various DIY ideas, such as cave shoes, hook and loop, rainbow head wear... after continuous design and modification, it was finally implemented in three versions: a basic version, a version that can change stickers, and a bluetooth RGB luminous version. Three versions, the price from low to high, round and smooth, strong and convenient, each with DIY elements, meet the needs of children listening to songs and lectures, and the playability is relatively high.