The binary demonstrator is a teaching tool that helps students understand the principle of binary counting. It consists of blocks (or cylinders) labeled with powers of 2 such as "1, 2, 4, 8, 16", each representing a binary number that can be stacked and combined. By adding or removing blocks, visually demonstrate the conversion between decimal and binary. The teaching aids are easy to operate, transforming abstract binary concepts into concrete combination games, suitable for primary and secondary school information technology and mathematics expansion courses, helping students master the underlying counting logic of computers, and are practical tools for programming beginners and number system teaching.