The littles are the ones that hatched just this last Saturday; they were being incubated when the snowstorm in Texas killed the electricity for 4+ days. They hatched on time, too! Went 15 for 22 on this hatch, amazingly enough. The bigger ones are 3 weeks old; they hatched and, later that evening, I came home and my wife had popped the incubator full again (the Snovid hatch).