His face lights up like a Christmas tree when Mike buckles him in and wheels him around the room a time or two. He's all grins and chuckles!
Outside, Jace takes the steering wheel and they head off into the wild blue yonder for a test drive. We (the grown-ups) grin and chuckle while Jace has turned serious, not a smile in sight.
He's busy concentrating on "driving his new car."