Answer:
I am a mammal that lives in the sea. I have flippers and am known for my intelligence. What am I?
I am small and green and hop around. I start my life with a tail but lose it as I grow. What am I?
What jumps when it walks & sits when it stand?
I'm a bird that can repeat the words you say. What am I?
I am known for my beautiful mane and people ride on my back. What am I?
I hold two meanings. With one I may be broken, with the other I hold on. What am I?