It's because he's a big brother

My boy is big. So big. Today he went out and kept working on his pedaling skills with his dad. Then he buckled himself in with the seat belt all by himself. I talked to him on the phone as I was about to drive home and I exclaimed how I was really impressed with how big he's getting. He told me "because I'm a big brother!"

Almost 15 months into the big brother thing and he's still proud about that. That just made my heart glow with pride.