When do children develop any instinct for self-preservation? When does…

When do children develop any instinct for self-preservation? When does it stop them from putting everything they see in their mouth? There's no strength left. I think I've made the apartment as safe as possible, but no, he will find a way to drive me to white rage. It happens within minutes. Recently, he took eye drops that were high up, I don't know how he got there. He chewed on them, thankfully the drops weren't toxic. Today I found a bald wheel on the toy car, there was no rubber. I checked if they had come off, he bit off pieces and ate accordingly, three pieces this morning came out, today he probably finished it all. I am happy, the