Sandal that expands by five sizes could spell the end of spending a fortune on children's footwear
- Sandal uses adjustable buckles and a strap on the toe to expand in size
- Kenton Lee dreamt up the shoe after seeing children in Kenya barefoot
- He hopes the shoes will help children in orphanages in poorer countries
- Children from one to six years old can go up a shoe size in a few months
