I was riding in the back seat of a Jetta in Chicago traffic, with my 18-month-old granddaughter in her car seat on my left and my son on my right. He had handed her his iPad with an app for babies -- by touching the pad she could make letters and numbers show up, and make them bigger or smaller or dance around by touching them in different ways.
She seemed to have accidentally exited the game, so she handed the iPad to her daddy, who touched the game's icon, opened it up and gave it back to her. After that happened a few times and they passed the toy across me, I decided to help her. It didn't take long to see how to swipe the icons across, find the distinctive and recognizable one for the game and return it to her. Yes, the iPad is indeed very intuitive to use. But I asked my son why the game kept closing on her, and he showed me the spot on the iPad frame that exits apps.
Then I caught on to her strategy. She was closing the game on purpose, so she could get dad's attention and involve him in her own iPad social interaction strategy -- apparently one that was much more satisfying than playing a silly alphabet game some geeky educator had designed to keep her occupied.
Babies invent new strategies constantly. I wish it was easy to get to that state of open play where new ideas are the best.