Good Riddles

Question: You're going to a friends house and want to give them some brownies. On the way to their house you cross 5 bridges. At each bridge you must pay a toll of half of your brownies to the owner. But they are all very nice and give you back a brownie from what you give them.

How many brownies must you start with to give your friend 2 brownies?

Question: What goes up, lets out a load, then goes back down?

Question: This is a bus:

 ____________________
|       |_|    |_|    |_|    |_|       |
|                                        |
|____________________|
     O                         O

Which way is the front of the bus facing (left or right)?

Question: 16 06 68 88 ? 98.

What is the '?'?

Question: These are the three lives of mine:
So gentle I soothe the skin,
So light I caress the sky,
So hard I crack rocks.

What am I?