

Ben and Lily are playing with their toy trucks in the yard. They like to load the trucks with sand, rocks and leaves. They make a big pile of sand and pretend it is a mountain.
"Look, I can load more sand than you!" Ben says to Lily. He scoops up a lot of sand with his shovel and dumps it on his truck.
"No, you can't! I can load more rocks than you!" Lily says to Ben. She picks up some rocks and puts them on her truck.
They keep loading their trucks until they are full. Then they drive them around the yard and make noises. Vroom, vroom, beep, beep!
They see a big circle on the ground. It is a dirty puddle. It has water and mud in it.
"Let's drive our trucks through the circle!" Ben says to Lily. He thinks it will be fun.
"Okay, let's go!" Lily says to Ben. She follows him.
They drive their trucks through the circle. Splash, splash, splosh, splosh! The water and mud fly everywhere. Their trucks get dirty. Their clothes get dirty. Their faces get dirty.
They laugh and giggle. They think it is fun.
But then they hear a voice. It is Mom.
"Ben, Lily, what are you doing? You are so dirty! Come here right now!" Mom says. She is not happy.
Ben and Lily stop laughing. They look at Mom. They look at their trucks. They look at each other.
They say, "Uh-oh."
