It's a printed circuit board (PCB) with an array of components soldiered ... If you're not familiar with all the headers, it can be a little daunting, but thankfully most boards have labels ...

The crown can bend through 180 degrees and can actually be worn as a head ornament, with pin headers to clamp it down on the wearer’s hair. [Rehana] used a tool called svg-pcb to design the board.