A “terrifying tyrannosaurus” can’t shake the attention of a baby dinosaur that hatches in the cave where the big Rex sleeps. Imprinting on the adult, little Rex calls him Dad and copies his boulder-smashing, tree-uprooting, other- dinosaur-scaring behavior. At first the big dino tries to ignore him, but Rex is annoyingly persistent. Eventually he comes to accept his adoring shadow, although when Rex asks if he’ll be as terrifying as his dad when he grows up, the adult dinosaur feels he has to clarify the situation. “You know, I’m not really your dad. You found me in a cave.” Still, the two have bonded and they recognize that they are family. Cartoon-style illustrations hilariously show the tiny dinosaur mimicking everything his gigantic dad does in this winning story that’s sure to be a crowd pleaser in preschool story hours. (Ages 3–5)