Answer:
You use it between your head and your toes, the more it works the thinner it grows.
If I have it, I don't share it. If I share it, I don't have it. What is it?
My first is nothing but a nameอพ my second is more smallอพ my whole is of so little fame it has no name at all.
Double my number, I'm less than a score. Half of my number is less than four. Add one to my double when bakers are near. Days of the week are still greater, I fear.
What kind of table has no legs?
People take me on walks and I run and have fun. What am I?