THREE RIDDLES

1)
When it leaps, it walks,
When it stands, it sits.

2)
A house with no doors,
Filled with millions of living creatures,
Yet not one word has ever been spoken there.

3)
It has no mouth, yet it whispers and sings,
It has no wings, yet it flutters and flies,
It has no teeth, yet it bites.

Answers:

1. Kangaroo
2. Ocean
3. Wind