A U.S. sportswear maker has designed shoes that expand to fit a child’s growing feet and is trying them out on cost-conscious German shoppers, the company said Tuesday.

Created by sporting goods firm K2, the shoe called “Max, the Worm” can grow an entire shoe size at the push of a button.

When the button is pushed, the shoe expands like an accordion.

Parents on a tight budget therefore need not buy a new pair of shoes every time their child has a growth spurt.

The shoe costs £33 and has also been approved by orthopaedic specialists, says Bild.

More here.