My son’s room has one of those wooden gates at the door to keep him corralled. One day I turn around to see what he was up to and, sure enough, he was half way up climbing over the gate. He didn’t quite make it, but I applauded his effort. A few weeks later he’s in the room playing again and when I turn around to check up on him, he has managed to rip apart the contraption, breaking a piece off and making it useless. He overcame the obstacle.