Those are the different holes in the walls of the house. You have different protrusions, like ledges, coming off the walls. They’re not so high, and they’re not so low. So you have to check those ledges as well as those holes. But the ones that are very high, where people’s hands really can’t reach them. But the ones that are very low, less than three tefachim (handbreadths) off the ground, do not need to be checked.
You use those holes and ledges. You have to be concerned that maybe there will be some over there. For less than three tefachim, let’s not treat them as things off the ground that you try not to use. It’s such a low place; you probably didn’t use it. But if you know that you won’t use them, even once, you won’t be able to check them. But again, if you assume that you used it there, even once, then you’d have to check.
And in a house with great beds, we’ve said many times, a house with its children... It’s very low; the kids crawl, so you have to assume that they put the over there. You have to check it.
Over the ovens. By the oven area, obviously, it’s cooking and things like that, so for sure you’d have to check on top of it, even in high places and stuff like that, because it is a place where Chametz (leavened food) is placed.