Shaking head no

My daughter has been shaking her head no lately. She was in her high chair playing with her toys and she went to go throw her play remote and I said “no, don’t do that silly girl” and shook my head no and she looked at me and shook her head no, threw it, and smiled. 😑 on the bright side they all landed in her toy basket beside her chair🤷🏼‍♀️😂 but every time I shake my head no or someone says no, she shakes her head no back.😂 I was talking to the dog and said “Ellie no” and my daughter shook her head no at her.😂