Here we have a carrot cutter that will cut carrots in matchsticks with ease.
You’ll need a cheap caulk gun.
If you can’t find one locally, search for “Skeleton caulk gun” on Amazon.
Here is one similar to the one I used: https://goo.gl/FEKoRW
If you get the caulk gun mentioned above and it does not quite fit, let me know and I’ll make changes to the design.
Cut the end of the caulk gun
Apply some glue and slide the main 3D printed piece onto the caulk gun's side bars.
Use a steel wire to make a cutting end
Attach the plunger
Pump the plunger until it reaches the cutter.
Cur the rod and glue the Lever.
Guide the carrot with a hand when you cut it.