My pet name for Theodore is Little One and Henry has picked up on it. He goes about saying, "You're so cute, 'witto' one."
"You're too 'witto' to eat cookies, 'witto' one."
"No, no, no, 'witto' one. You can't eat my fingers." (As he allows Theodore--with a smug smile--to put his fingers in Theo's mouth.)
Case in point.
Ready for a walk!
Welcome, Spring! We're glad you're here.