This recording sheet was used in unison with the "How Do Dinosaurs..." books by Jane Yolen and Mark Teague.
I found small dinosaurs that grow when placed in water in the Target dollar section. I have seen these growing dinosaurs at many other stores as well.
My students recorded observations before the dinosaur was placed in the water and then predicted what they thought would happen to the dinosaur over time in the water. They then recorded their observations after the dinosaur grew.