Hey! The baby is like a little vacuum cleaner, he picks up any crumbs …

Hey! The baby is like a little vacuum cleaner, he picks up any crumbs from the floor and puts them straight in his mouth. Even though you clean up, he'll find something anyway ? So, how do we safely remove all this from his mouth so he doesn't swallow anything by accident? He's also resisting, and every time I'm afraid he might swallow some nasty thing