Overview: Smarty Pants Allergy Free A Mother's Pain Smarty Pants Women will understand this story straight away… but blokes may be left slightly bewildered. Sara Blakely is the creator of Spanx and by making bums look beautiful, she's made herself a billionaire. Like all good ideas, it started very simply. Sara didn't like the way she looked in a tight white pair of pants, so she went about trying to hide the bad bits and shape the rest. Now, as Allison Langdon discovers, women all over the world are giving thanks for Spanx and Sara has more money than she can count. Reporter: Allison Langdon Producer: Stephen Taylor Allergy Free Childhood allergies are frightening and they're getting worse. One in 10 kids born in Australia has a food allergy - one of the highest rates in the world. If your child is affected, it takes over your life. You're forced to navigate around family meals, school lunches and birthday parties - knowing one tiny speck could be fatal.