Girls, tell me I'm afraid of something happening to my child that they…

Girls, tell me I'm afraid of something happening to my child that they might swallow. Everything goes straight into their mouth. I remove all small items immediately, and sharp objects obviously too. But we go to my mother-in-law's house, and there are always children around, throwing toys everywhere (big and small). I leave it when I help in the kitchen. Or on errands when I need to take my son somewhere (very rarely). That's why I'm terrified that I won't see or someone else will.