2 years old.
Cow: "Mooooove over"
Sheep: "Naaaaaaa."
or
Only one. But he'll leave a big puddle of spit on the floor underneath him.
or
She ran away from the ball.
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Because he want to wake up some day as America's First Dictator.
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Only two, but the hard part is getting them into the light bulb.
or