"Happy Wake-up Song", "Father-in-law Sun". According to the query of Kugou Music:

1. Excerpts from the lyrics: Children, sleep well, get up quickly, don’t be a little lazy, lazy is fat.

2. Excerpts from the lyrics: Father-in-law Sun, love me more, I will sing a song for you.

3. "Happy Wake Up Song" was originally sung by Zhang Jingjing, written by Chen Shuang, and composed by Chen Shuang.

4. "Father-in-law Sun" is a children's song sung by Circle Baby, composed by Liu Zhihong and written by Liu Zhihong and Li Jingping.