After Anna Kelly wowed us with her adorable winning entry for our Mother's Day DoodleOff, we asked her to share her knowledge. Phone and tablet cases are some of our most popular Doodled projects, so Anna used her Doodling expertise to give us this tutorial on how to Doodle your own custom phone case.

Follow Anna to see more:

What You'll Need:

  • Your 3Doodler (V.1 or 2.0)
  • Nozzle Set (optional)
  • FLEXY Plastic in colors of your choice (Anna's Note: this project used 4 blue, 2 aqua, and 1 white)
  • Marker
  • Scissors
  • Strapping/packing tape to provide a surface for plastic to stick to, and to protect surfaces (3Doodler recommends masking tape or blue tape to avoid leaving a sticky residue on your phone)

Anna Also Recommends:

  • Wire cutter (to cut off melted ends)
  • Tweezers (for taking little bits of plastic off the nozzle, or for holding plastic down in place when necessary)
  • Dummy phone (Get one for the exact same model phone you have if you don't want to use your real phone)

1Tape it tightly

Carefully cover the back of the phone with tape, making sure to leave at least half an inch on each side. Wrap the tape around the sides towards the front, making sure that it is flat against the phone. Trim some tape off the corners to make it easier to wrap around. Fold the tape over the top and bottom of the phone.

Anna's Tip: Because phones typically have rounded corners, it helps to make the taped corners as smooth as possible. Cut thin strips of tape and attach diagonally to the back of the phone, making sure there is enough to wrap around to the front.

2On your mark, get set...

With a marker, outline where the buttons and openings are. This will make it easier to avoid these areas later.

Remember to mark:

  • Camera lens
  • Charge port
  • Headphone jack
  • Home button
  • On/Off/Hold button

3Doodle in dots

Start Doodling around the perimeter of the phone, front and back. Then Doodle back and forth between the front and back perimeters to connect them.

Anna's Tip: You can Doodle in a straight line. I prefer to Doodle in “beads” to ensure that there are many points of contact, in case the plastic doesn’t stick at some points. 

4Forming a foundation

Doodle widely spaced horizontal and vertical lines. Then Doodle to make the grid smaller.

Anna's Tip: If you did the lines horizontal first then vertical, continue making lines in that order. 

To further reinforce the back, make diagonal lines. 

Anna's Tip: Take note of where the camera and flash are (and the logo as well, if you want it uncovered).

5The moment of truth

At this point, you can bravely but carefully peel your case off the dummy phone. Check to see if there are weak points that need to be reinforced. 

6Style at will

With the aqua plastic, Doodle swirls freehand on the back, and reinforce the front perimeter. With the white plastic, add ovals to the sides of the phone, and random circles and ovals on the back.


Enjoy your new Doodled phone case! Try out other color combinations or customize your design just for you.

Making your own Doodled case?

Show us your version of this useful Doodle! Be sure to tag us @3Doodler and use #3Doodler and #WhatWillYouCreate