Harmon and Rachel are just inseparable. He "gets" her and she "gets" him. They share toys, they take turns pushing each other on the riding toys, and he is even teaching her how to walk by letting her hold onto his pants while he walks her slowly around the house. It is really cute! They remind me of Buzz and Woody in Toy Story with that song singing "You're my Best Friend".
I always knew Harmon and Callum would be close b/c nothing beats the bond of brothers. I also always knew that Rachel and Callum will always be close (they are twins after all). Now it feels like a perfect circle... I know, I'm cheesy!