When my daughter was very young, we had to take a small puddle-jumper turboprop from DEN-COS.
A very bumpy half hour skirting the front range of the Rockies.

At one point my little darling is just smiling (and NOT kicking anyone's seatback ) and the next instant she is covered in her own partially-digested lunch looking very sad.

After cleaning her up, she recovered fully and was the same smiling little girl that started the flight. ^