Explaining to a 4-Year-Old How Chickens and T-Rex Dinosaurs Are Like Cousins

Hi there! Imagine you have a big family, and you have cousins who are like brothers and sisters but a little different. Chickens and T-Rex dinosaurs are like cousins in the animal world! A long, long time ago, the T-Rex was a big, scary dinosaur. But now, chickens and all birds are the little relatives that came from dinosaurs a very long time ago! So you can say, 'Chickens and T-Rex dinosaurs are family because birds are like tiny dinosaurs.' Another way to say it is, 'Chickens and T-Rex dinosaurs are distant relatives who come from the same family tree!' Isn't that cool?