How old is she? Do all the kids sit in booster seats at your daycare? If they all do, then I would get her to too. My daughter started doing that around 2 yrs old and I let her sit in a regular chair as she was big enough. I kept the booster handy and if she ever started to walk around during a meal or not "sit like a big girl" she went back in the booster for the meal. She quickly caught on and sat in the big chair.