S.A.
When my son was an infant we had a house with stairs that flared at the bottom, we couldn't find a gate for them. So, I taught my son to go up and down the right way. By the time he was 10 months he was completely independent. He never once fell. I would shut the doors to the bedrooms so there was nothing he could get into, he just crawled up and down the hallway and loved it!