Today's Easter Egg Roll at the White House has included a question-and-answer session featuring President Barack Obama and a gathering of young boys and girls. But it was the president asking the questions.

President Barack Obama sits with his dog Bo and reads a book to children during the annual Easter Egg Roll on the White House tennis court (Mark Wilson/Getty Images)

He first read a children's book to them -- with his dog Bo seated by his side. The popular illustrated book "Chicka Chicka Boom Boom" is about alphabet letters and their adventures climbing up a coconut tree.

The president concluded that the alphabet "is full of troublemakers."

He then asked the kids questions -- had any of them lost a tooth? Climbed a tree? Had any of them fallen after climbing?

It's a day that kids devote to chocolate and jelly beans, but first lady Michelle Obama was sticking to her campaign against childhood obesity, stressing healthy eating habits. She said, "Kids, eat your vegetables."

The 30,000 children and parents who gathered on the South Lawn played games, danced, and mingled with athletes, entertainment figures and "Sesame Street" Muppets.

Among the stars scheduled to attend are Minnesota Vikings running back Adrian Peterson, NASCAR driver Danica Patrick, gymnast John Orozco and Washington Wizards point guard John Wall.

Two of the younger celebrities in Monday's lineup are Oscar-nominated actress Quvenzhane Wallis, star of "Beasts of the Southern Wild," and Robbie Novak, who plays "Kid President" in a series of popular YouTube videos. Elmo, Abby and other "Sesame Street" Muppets will also be performing.

(Copyright 2013 The Associated Press. All Rights Reserved)