We found Inchworm shoes recently via surfing Gizmodo.
These kids’ shoes expand one full size (in half-size increments) thereby increasing the amount of time that your kid can actually wear them since for such wee little feet chances are, the shoes won’t get worn out, but rather grown out.
Cute! These slip-on Primers ($19.95)
From a product design point of view, I’d love to get my hands on a pair to see just how the sizing mechanism works.
(They even address this a bit in their FAQ:
Why hasn’t this been done before?
Because as simple as it is to operate the shoe – this was not easy to accomplish!)