Object: A mushroom

Good morning, boys and girls. I brought with me a mushroom this morning. As you probably know, some mushrooms are edible. That is, we can eat them. Other mushrooms are poisonous. It would be dangerous to eat one of them, wouldn't it? Now, how do you tell the difference between a poisonous mushroom and a non-poisonous one? The answer is you cannot. Oh, experts have ways of telling. That's why we can buy mushrooms in the store. But the average person simply cannot tell one from the other. Now, what does that m…