Quantity   Component name
1 × Tindie head PCB
2 × 5mm RGB flashing LEDs https://www.aliexpress.com/item/100pcs-LED-5mm-Superbright-Transparent-Straw-Hat-RGB-Fast-Flash-Automatic-5-mm-DIP-Light-Emitting/32280310015.html
1 × Pin & pin back https://www.aliexpress.com/item/100-Pairs-Butterfly-Clutch-Tie-Tacks-Pin-Back-Replacement-with-Blank-Pins-for-Craft-Making-Silver/32801251429.html
1 × Battery holder https://www.digikey.com/products/en?keywords=BK-916-CT-ND
1 × CR1220 3v Battery
1 × Micro SMD Slide Switch http://www.mouser.com/Search/ProductDetail.aspx?R=SSSS810701