The traditional mathematical rotator has many shortcomings, as follows:

1. Cost and cost-effectiveness issues: The first generation product included 18 independent addition, subtraction, multiplication, and division turntables, resulting in increased costs, higher unit prices, and lower cost-effectiveness.

2. Design flaw: Using 3D printed gear rotation design, there is a stuttering problem that affects the smoothness of rotation.

3. Safety hazard: The edges of 3D printed gears are relatively rough, which poses a potential risk of scratching children's hands.

4. Poor portability: There are many turntables, and the overall volume is large, making it inconvenient to carry and easy to lose.

5. Insufficient durability: The digital identification is prone to detachment, which affects the appearance of the product and increases the difficulty of calculation.

6. Function deficiency: The absence of a turntable can cause the calculation process to be obstructed, affecting the learning experience.

All of these may cause unnecessary difficulties for children's learning. We are well aware of these pain points and are determined to improve.