To make this you need automatically flashing RGB LEDs and 3V tablet battery like CR2032 or similar. Also, you should use 1.5x0.2 mm solar busbar wire ribbon for making a switch.
This thing included eleven different models with switch integrated. Just print and assembly.
For assembling you need a small piece of 1.75 mm filament about 1 cm length. Also needed two copper busbar wire about 2 cm length for making contact group. The filament of 4 mm length inserts into the switch_main part to make rotation limiter. After that insert busbar in a slit and turn down. Place busbar into side holes and bend. Insert switch_main with busbar into switch_ring For complete assembly insert filament through the holes in switch_main and switch_stopper part.
Use a CRxxxx Battery Holder Generator to make a holder for battery power supply.
Video of bauble in action https://youtu.be/4B_Ifhq_KtI