To bend the cardboard strip into a basic inchworm shape, you need to fold it up in the middle and out at the ends. The feet at each end should be about 2 inches (5 cm) long.
Tip: Use a rounded-tip tool, such as the cap of a pen, to score the cardboard by gently, indenting the line you want to fold. Be careful not to rip through the thin outer layer of the corrugated cardboard.
The feet need to help to grab the surface below them so they can propel the Inchworm along. Some suggestions:
Cut slits along one end to make toes. Then alternately fold one toe up and the next toe down.
Cut Some Teeth
Use a craft knife or small box cutter to make V-shaped teeth . The points of the Vs should face towards the back of the Inchworm.
Bend each tooth down so it sticks out on the underside of the foot.
If you bend the edge of the foot up, the front row of teeth will point directly down for extra bite.
Make simple fangs by folding down the corners of the foot.
Or use scissors to cut a zigzag line of fangs along the edge.
Other suggestions creating rubbery treads on the bottom of the feet using dabs or lines of hot glue.
The sample Inchworm in this guide uses teeth in the front and straight toes in the back.
The best solution depends on the kind of cardboard and the texture of the surface it will be crawling over, such as carpeting.
Tip: A strip of felt makes a good crawling surface.