Quantity   Component name
1 × Adafruit Feather Bluefruit LE I used the 32u4, but others will probably work too
1 × 3.7 V LiPo Battery Mine was a 450 mAh battery! Keeping it small :)
1 × Wire I used wire-wrapping wire because it's tiny and wonderful
1 × Protoboard Mine was a 2cm x 8cm, cut in half
1 × 3D-Printed Parts stl files available at github.com/cmsunu28/sotto
1 × Solder, Hot Glue, Your Computer, Your Micro-USB Cable, etc You know. The Basics.
5 × Mini pushbuttons Yep! Your average buttons.
5 × Vibration motors 10 mm pancake motors
1 × Switch Your average small switch, nothing fancy
1 × 4-pin JST headers Both male and female!