THREE RHYMING RIDDLES

1)
We come in many different colors,
Each one different from the others.
We fall to earth and do not rise,
But before we do we please the eyes.

2)
Where I live is where I stay,
From this spot I cannot stray.
Yet from my home man taketh me,
To build a home I'll never see.

3)
The older I get, the smaller I grow;
My best friend is my worst foe.

Answers:

1. Leaves
2. Tree 
3. Soap