bird (3 years old)
some birds which 3 years old can recognize
| reptile (3 years old) |
| creature under the water |
| Insect (3 years old) |
| mammalian(3 years old) |
| fish (3 years old) |
| microorganism |
| bird (3 years old) |
| π mypage |
| π₯ ranking |
| π chart |
| π rule |