You wanna get them for when they’re on the move :) when you put them down and they can push them selves around or crawl xx
Not for quite a while. Only when they're able to get up the stairs, which won't be for about 9 months (ish).
When their crawling about and can go where you dont want them to
We did when he started crawling/pulling himself up stuff as we were worried around the stairs and we had one on the kitchen too. We now have 1 on kitchen for when we are cooking and his bedroom. He's 2.5yrs so is fine up and down the stairs when we are there 😀
Oh you've got a long time yet! Not until they're crawling