The Adafruit MONSTER M4SK's screens are perfect for adding animated eyeballs to your costume mask. With some simple additions made from craft supplies, we can make the M4SK comfortable to wear and allow you to see your surroundings through the costume mask's eye holes.

MONSTER M4SK DIY Electronic Face mask.  Two Screens Display Eyes that blink and dart up and down.
Peep dis! Have you always wanted to have another pair of eyes on the back of your head? Or outfit your costume with big beautiful orbs? The MONSTER M4SK
In Stock

2x Convex Lenses

Convex Plastic Lens with Edge
The eyes have it! Add this little lens to make a big expression with our Spooky Eyes demo for microcontrollers or Raspberry Pi. These are plastic lenses, with brilliant clarity and a...
In Stock
Lithium Ion Polymer Battery 3.7v 420mAh with JST 2-PH connector and short cable
Lithium-ion polymer (also known as 'lipo' or 'lipoly') batteries are thin, light, and powerful. The output ranges from 4.2V when completely charged to 3.7V. This...
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In addition to the parts above you'll need:

  • Costume mask (I used this Dollface mask)
  • Thin neoprene rubber or foam, such as a soft glasses case, thin mousepad, black craft foam, or a sleep mask
  • Two small Velcro strips
  • Scissors
  • Black permanent marker


  • Black hose or other thin, stretchy fabric to cover the eye holes from within if your mask doesn't have this feature -- you may need to cut out larger eye holes on a mask such as this clown mask
  • Hot glue or contact cement
  • Black gaffer's tape

This guide was first published on Sep 04, 2019. It was last updated on Mar 08, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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