I will be honest - I had three kids under 15 months - two of them walking but not capable of going down stairs and it was a COMPLETE nightmare. I don't know if maybe it was just the personalities of the babies, but I found it very difficult. If we were going down to the basement, I always had to leave one alone so I could bring the first two and then come back up for the third. Not to mention their temperaments. They tend to be a little more sensitive, and napping was a disaster bc they would egg each other on. HOWEVER, I think it may have been one of the personalities. Since one of them has been gone, things have been a lot calmer. But I really hesitate on taking on another child who is younger than 15 months. I'm scared lol