Babies are confused by a lot of things. Bedtime, peek-a-boo, algebra, but nothing can confuse a baby more than when their parent has a twin. Chris' brother Johnny is his identical twin and the baby has a hard time figuring out who is his dad. So they swap the baby back and forth, confusing the poor kid.
Next, sand! Anakin Skywalker might hate it, but little Ella is amazed by it. Her parents took her to the beach for the first time and while she doesn't seem to care about the sand at first, she's slowly becomes intrigued. Ella might have a new favorite thing to play in. Just wait until she learns that you can build castles out of that stuff!