I started off with sketching what characters I'd like to base the template on. I initially wanted to do Draculaura out of the six designs but because of the way her pigtails work I didn't feel confident with doing her first until I could problem solve. I ended up sketching and basing the template on Tosen Kaname from Bleach

Next I had to design 3+ piece to make him, him. He had glassea or a blindfold, and long braids which were made in fusion. 

 Using the assemble-joint tool you can insert the different parts and add them and connect them to the template. 

The rendering button when you change workspace is how you can change the colors of your brick headz. Be mindful of what color filament is available before you pick a color like teal. I didn't think like this causing a small curve. Change the scene, the suns direction and press the render button. You will need two different renders for your box. 

Download and send the file to inkscape. 

Using the rectangular box, you can place colors down around where you want certain colors. Mine was primarily purple. 

To get the corners one down from the select button you can get edges.

Add the renders and also an image of the character you chose, if its original maybe a drawing of yours.  

Put the pages on a usb stick print them using printable vinyl. 

Stick them on the cardboard line it up using the bricks edges, form it together and  use double sided tape.