Someone mentioned in my post below that it is surprising that my girls can still RF in Roundabouts. They are nowhere near the weight limit, but are slowly inching toward outgrowing the height limit.
However, it makes me wonder.... do my girls have oddly short torsos or something? Charlotte is the tall one (35 inches as of yesterday, which is 75-90th percentile) and her butt to shoulder height is 13+ inches (she was wiggly). The RF limit on the Roundabout is 15 inches.
Do you know your toddler's? How does it compare!