Stop putting that in your mouth!

I think I say that to Boo 100 times a day. He's going through a phase where he thinks the world is his smorgasbord. Everything, and I do mean everything, goes in that mouth. I find myself sweeping his mouth after I see him put something in there but didn't see what it was. It's driving me nuts. And this morning, I was walking past daycare when I caught him putting a piece of glue in his mouth. I caught him and then called his teacher to tell them to watch him more carefully. He's a little scootch.