Welcome Back Ah-ma!

We picked up Ah-ma (grandma) from the airport and had a welcome back dinner together. We missed you! On the way to dinner NJ said he saw a train. Then Baba pointed out the metro link along the freeway. NJ says, "They stop to pick up the people waiting? To go home or somewhere?" Yes, or somewhere! 
On the way home, there was a nice sunset. I pointed out that the sky was pink. NJ says, "And orange. And yellow and blue. But I don't know why there's no green and why there's no purple."