Steampunk Grenade

This is a remix of Reg Taylor’s wonderful Steampunk Grenade (https://www.myminifactory.com/object/3d-print-steampunk-grenade-3280). I took Reg’s suggestion and added some lights and sounds. Here is a list of parts that I purchased for this project:
2.54mm JST-XHP Connectors (https://smile.amazon.com/gp/product/B015Y6JOUG)
10mm Green LED (https://smile.amazon.com/Diffused-Green-10mm-LED-pack/dp/B076L2C8VF)
AAA Battery Terminals – 9.5x9mm (https://smile.amazon.com/gp/product/B07HRRV57Y)
5V Piezo Buzzer (https://smile.amazon.com/gp/product/B07GJSP68S)
Arduino Nano (https://smile.amazon.com/gp/product/B00SGMEH7G)
Adafruit 3.7V 400mAh Lithium battery (https://www.adafruit.com/product/3898)
JST PH 2-Pin Cable (https://www.adafruit.com/product/3814)
I also picked up an Adafruit Micro-Lipo Charger for the battery (https://www.adafruit.com/product/1904)
All the wire is 24 AWG stranded (https://smile.amazon.com/gp/product/B07DCV7BDD)
SWITCH BLOCK
To assemble the switch block