It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

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

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

How can you take 2 from 5 and leave 4?

What is the centre of gravity?

What do you answer even though it never asks you questions?

Can you count the number of blocks in the picture below?

Lifeless eyes on my smiling face and watch your child's sleeping place. In their dreams they hold me tight. What am I?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?