HELLO地球（郑州图书馆） vs Wonder Circuits

《HELLO 地球》是由郑州图书馆为孩子们打造一个神奇的世界。结合 AR 新科技，通过运用三维模型动画、解读等丰富的数字化表现手法，全面升级认知教育模式，给小朋友们带来更加生动、震撼的体验。

Learn digital logic through 62 lessons in 13 chapters. Start with AND, OR and NOT, then build binary adders, feedback circuits, registers, memory and state machines. Assemble a visible four-bit computer and write programs for it. Start with the first 14 lessons and the complete Logic Lab for free. One optional purchase unlocks the remaining 48 lessons and all future core content. No subscriptions or consumables. Build freely in the complete Logic Lab, save reusable chips and share offline blueprints. Works offline, with no accounts, ads or tracking. This is a digital logic simulator; it does not model voltage or current. Campaign lessons still progress in order after purchase.