Logic Riddles

Question: 4 people walk onto a bus, there are only babies on the bus what is on the bus

Question: The Duke of Riddleton has been kidnapped. The police have identified 3 suspects, all of which had motive, and opportunity to do the deed. Their names are Andrew, Jason, and Shawn. All of them claim that they didn't do it, but Jason and Shawn seemed nervous wile being questioned. There was a note left behind, with the following description: 1491011. Who kidnapped the duke?

Question: A man enters a field. As soon as he does, he dies. He is carrying a mysterious package. What is the package and why/how did he die?

Question: A man has 3 children and half of them are girls, how is this possible?

Question: There are 31 horses on a cliff, first they jump into the air, then they come down and stop, then they stand still.

Why do they do this?