Pictures:

Why is it hard to organize a professional hide-and-seek tournament?

Good players are hard to find.

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What is blue and smells like red paint?

Blue paint.

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How do trash collectors learn their trade?

They pick things up as they go along.

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What begins and ends with E but has only one letter?

Envelope.

950

When Bobby threw a ball as hard as he could, why did it just come back to him?

He threw it up in the air.

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