In case anyone out there is wondering, "Just how easy could it be to use an iPhone?", I have the answer.
This afternoon I took Lyle downstairs to his room for a nap and promptly fell asleep on the floor next to him for one of my refreshing mini-naps. When I came upstairs 30 minutes later, Baxter (whom I'd left playing with the map feature on my iPhone) was deep into a text message conversation with Matt in Seattle.
It had taken Matt 4 messages to figure out that it wasn't me typing. Baxter actually started the conversation on his own with a "Have a great time" message! I think it was the turn when he told Matt that he was reading a book with a "palintologist" in it that Matt finally realized it was his son! Now they're having so much fun that Baxter's taking a photo of me to email to Daddy, at Matt's request.
Baxter has used email before and can type and send messages independently, but to be able to navigate around text messaging so easily? That's one user friendly piece of technology.