Who is the genius?

The Mustard Family

Riddle:

Mr. and Mrs. Mustard have six daughters and each daughter has one brother. How many people are in the Mustard family?

Priceless

Riddle:

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

Only One Color, But Not One Size

Riddle:

Only one color, but not one size, 
Stuck at the bottom, yet easily flies. 
Present in sun, but not in rain, 
Doing no harm, and feeling no pain. 
What is it?