What does my sister look like when she walks and swings?

Like penguins.

Penguin walks on the swing, and my sister walks like a little penguin.

Why do penguins walk from side to side?

1. Penguin's center of gravity is unstable. Penguin's abdomen accounts for a relatively high proportion of its limbs, while penguin's hands and feet are relatively short, which means that penguin's short and slender limbs bear a relatively large gravity in the middle abdomen. After the penguins are fully foraging, their walking steps are more obvious.

2. Penguins living in Antarctica walk on the ice-covered Antarctic continent all the year round. Because of the uneven ground and the unique body structure of penguins, penguins walk from side to side.

Penguins are born to live and work in peace and contentment, which gives them an embarrassing appearance, so they walk from side to side, which is actually a natural and random life expression based on their own life forms.