Lydia is learning Strategy

We have a computer game that Lydia likes to play called JumpStart. The grandparents gave it to us two years ago, and we've bought the entire series of games to that Lydia can stay challenged. She hadn't played for a few months, and I noticed that her strategy spontaneously matured in games like tic-tac-toe. She now tries to block the other player from winning when the situation calls for it.