What does this simple rebus mean?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.

I add 5 to 9 and get 2. The answer is correct, so what am I?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

A pregnant woman is preparing to name her seventh child. Her children's names so far are Dominique, Regis, Michelle, Fawn, Sophie, and Lara. What will she name her next child -- Jessica, Katie, Abby or Tilly?

What is the below Rebus indicate?

I speak without a mouth, and hear without ears. I have no-body, but I come alive with the wind. What am I?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Find the next number in the sequence

1, 2, 6, 21, 88, __?