Jack is four years old. He can count to ten and knows his ABC's. Jack likes clowning around in front of his mom and dad. He has fun making silly faces and loves to dance and sing. He also likes roaring when he plays with his dinosaurs. You can hear Jack laughing and playing at home all the time. Jack is a happy boy but he is shy. When he is around others, he doesn't talk. "Jack, don't be shy!" say his mom and dad. But he still refuses to talk. Then one day Jack meets Sarah and her shaggy dog. He is curious about that shaggy dog. What will Jack do? Will he talk to Sarah to get close to her shaggy dog?