In this activity, students will investigate the similarities and differences between the eggs of three vertebrate classes. They will begin by classifying vertebrates into fish, amphibians, reptiles, mammals, and birds—as well as exploring which of these animals lay eggs. After discovering a dinosaur egg during the TimePod Adventure, they will continue to learn about the eggs of different animals. They will watch a short video as they consider the similarities that all eggs share. They will then participate in a jigsaw activity in which they work in small groups to become experts about fish eggs, reptile eggs, or bird eggs, and they will educate their peers on what they have learned. They will ultimately use their knowledge to collaboratively compare and contrast the eggs of these different vertebrate classes, and they will construct a wonder or ask questions they still have regarding egg-laying animals.