I put on my brother's cotton-padded jacket, and he jumped up happily.

I am a child in a big class. This poem comes from an educational poem named "I am a child in a big class" in a kindergarten textbook, aiming at teaching children to be helpful and filial to their elders. Lyrics excerpt: I helped my brother put on a cotton-padded jacket, and my brother jumped up happily. I helped my sister fold the plane and my sister smiled happily. I helped grandpa to rub his back, and he was so happy that his beard became warped.