Things that I don't know

Sophia is seriously into Elmo. Last night, after changed, Sophia held a clean diaper which has a cute elmo on it. She showed me Elmo and couldn't stop talking "Elmo, Elmo...". She held that diaper for more than half an hour, no matter what I used to distract her, she didn't let that diaper go.
This moning, when I dropped her at daycare, her teacher told me she learned "Elmo" because she told her and showed every time she changed her. She also told me that Sophia talked a lot at daycare. Sophia copies her teacher's words all the time. She says "lie down" at nap time. How amazing! She says "睡觉" to me at night.