Quoting Kelly +2 ERF/EH!:" Addy wont be in one for a few years. She's 4 and harnessed in the Nautilus. She's 35lbs and 43in tall."
Quoting Addi's Momma:" except my Addi is 38 lbs and 42 inches tall. She is 3. When she maxes out her nautilus then I will move her to the booster. She still has 10 inches or 27 lbs to go."Yep. When addy outgrows the harness, then we'll take out the harness and use it in high back booster mode.