A Question of Why or Where?

"Daddy, where is that truck going?"
"Daddy, where is thet plane going?"
"Why are we going home?"
"What is that bird doing?"
"Where did that squirrell go?"
"Where is that car going?"
"Why do I have to eat now?"
"Where is that other plane going?"
"Where is that big plane going?"
"Where is that blue truck going?"
"Look at that big red truck, where is he going?"
"What is that bird doing?"

"When do they stop?"

I am running out of answers.