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Which five words best describe Twenty Yawns? Jane Smiley: Cheerful, colorful, loving, amusing, relaxing.

This is a wonderful story for inducing pre-sleep yawns and transitioning toddlers and preschoolers from an active day into restful slumber.

Andrew Zettler is an American illustrator, writer and cartoonist. He is a member of the New York Society of Illustrators, originator of the comic strip Half-Baked, author of The Teeniest Tiniest Yawn, and has illustrated children's books including Alphabet Olympics and Albert Acorn.

Q: If Ronald is the mascot of McDonald’s and Hamburglar is the hamburger, then what kind of food is Grimace?

A: Apparently, he’s neither an eggplant nor a rotten pickle that went astray in the stock room. McDonald’s folks refer to Grimace as a big fuzzy purple fellow who, according to them, is Ronald McDonald’s good buddy. His clumsiness causes loads of trouble in the McDonaldlandia, but that just goes to represent the tyke in every fries-loving dude.

Q: Why do we yawn when we feel sleepy?

A: Theory No.1: A yawn is your body’s operandi to take more oxygen into blood while yanking more carbon dioxide out of your fluid. It happens as an auto reflex, which means it’s implemented the same way the traffic enforcer executes traffic rules: you’re left with no choice. But sleepless nights of research have shown that neither more O2 nor breathing more CO2 affects your yawning frequency level. So junk that.

Theory No.2: yawning stretches the lung tissue to increase heart rate and wake up sleeping muscles and joints, which may be true.

Theory No.3: yawning is a system to redistribute surfactant, a fluid that lubricates lungs to keep them in tip-top shape.

Q: How does a lie detector work?

A: A lie detector is polygraph machine that tracks the physiological changes in the subject’s blood, breathing pulse, and perspiration. Notice how your partner tends to sweat more and gasp for breath when they tell you that they came when in fact they just faked it?  That’s pretty much how this clever catcher works, too. the subject is asked “yes” or “no” questions and the truth level is measured through the rise or fall in the sensors.