Today Pororo and friends are at Petty’s house. Amazed by Petty turning the hula hoop, Pororo and Crong try but it seem a bit harder than they thought. Pororo and Crong then find a tennis ball on the table. They run up and down the house playing with the tennis ball that bounces higher than their heights. The ball hits one of the shelves and knocks down the books on it. Petty jumps up and catches the falling books. All the friends are surprised to see Petty having such quick motions…