Barney the Actual T-rex

65 million years ago, dinosaurs walked the earth. Present day, a trip to the museum inspires a small group of orphaned children. They later return to the orphanage, and decide to use the power of their imagination a friendly T-rex. As if by some sort of magic, their wish comes true. Enter Barney, named after the friendly caretaker, a purple and green Tyrannosaurus Rex, who doesn't know how or why he's there, but knows what his mission is: to protect the children and spark their imaginations.