I don't have any personal experience, but a friend who has an 8 year gap between children basically said anything not safe for her little one stayed packed away until he was asleep or out of the house, or under direct supervision (ie she's actually playing with him). The eldest also had to play with most 'dangerous' stuff in his room with the door closed and she was a real stickler for him tidying up before he came out. She didn't have baby gates.