Adafruit 1.44" TFT LCD Display cover and lens holder for Eyeball Bowler Tutorial found here:

https://learn.adafruit.com/animated-electronic-eyes-using-teensy-3-1/bowler-hat

My video can be found here:

https://www.youtube.com/watch?v=CsEU-dP8dx8

I used a Teensey 3.2, an Adafruit 1.44" Color TFT LCD Display and other components listed in the tutorial. I found 1" circle lens in the jewelry section at the hobby shop. They are a little smaller, and not half round like in the tutorial, but I think it looks good. I didn't cut a hole in the band, and I didn't hide the components behind the band. This cover holds the TFT display and lens so they both mount on top of the hat band. I put a slit in the hat under the cover and behind the hat band. The ribbon cable is passed through the slot. The Teensy, and battery are velcroed to the inside top of the hat. There is plenty of room inside.