We switched LO2 from the high chair to a booster that attaches to the chair about 6 months ago, she loves it! LO1 i 3.5 and has been sitting in a regular chair for a while now...I think since around 2 years old. Since then though, we bought a counter height table so I'm nervous to let LO2 sit without a booster. She sits in a regular chair at my parents, but the chair height is normal...so not as worrisome.

When did LO start sitting in a regular chair, with no booster?