Virginia native, Katie Hughes, could have saved herself a lot of money on school tuition going to Princeton for a chemistry doctoral graduate degree.

The 31-year-old quit her job to become a licensed Zumba instructor, which led her to create Slip-On Dancers, which allow Zumba participants move easily during the fitness class – rather than a cross-training sneaker.

The Slip-On Dancers are basically elastic worn over traditional sports shoes that allow the foot to glide smoothly over carpet or a wooden floor, while retaining enough friction for other moves.

Bringing her business idea to the Zumba convention in 2011, Hughes Slip-On Dancers sold out.  Last year more than 15,000 pairs were sold for $15 a go, mostly in the U.S. where sales are made online and through 700 Zumba studios nationwide.

This is one of those inventions where I’m like, ‘Why didn’t I think of that!’  Good for her!