Upon observing the kids, I'm finding that they each have their own way at learning different things. Andrew is better at figuring things out on his own. He can look at an object or toy and discover how it works. Currently, he's reassembling the transmission in our CR-V.
Emma is much better at listening and copying. I think that's why she was able to wave and clap before Andrew. My dream for her is that she will become the next great impersonator a la Rich Little or Frank Caliendo. Perhaps she can have her own show in Vegas one day. Her current repertoire is Joan Rivers, Joy Behar, Margaret Thatcher, and Carrie Ann Inaba.
The newest trick Emma learned is how to rub her tummy when someone says "yummy." Before leaving for Sacramento, Crazy Grandma Ichikawa taught her how to do this. Another thing that Crazy Grandma Ichikawa taught Emma is how to nag. And if there's one person who's an expert on that, it's Crazy Grandma Ichikawa. Sigh...
Here's a video of Emma doing her yummy: