根据平衡鸟原理设计，通过3d打印模型内部不同的填充密度改变蝴蝶重量分布，可通过调整蝴蝶翅膀角度改变蝴蝶在树枝上的姿态。可轻轻出动触动蝴蝶，使蝴蝶在树枝上翩翩起舞。

Designed based on the principle of balanced birds, the weight distribution of butterflies can be changed by varying the filling density inside the 3D printed model, and the posture of butterflies on tree branches can be altered by adjusting the angle of their wings. Gently move and touch the butterfly, making it dance gracefully on the branch.