Like anything else, Segaworld would want to celebrate it's anniversary of being open--and let everyone know too! So here's a pin or badge which says "Happy Birthday Sega World Sydney". However, take a close look at this pin. It is the return of "Blue Arms Mistake Sonic"! They've even bothered to do some shading on the blue arms, so it wasn't just someone clicking the wrong color into place. Still, this is a nice collectible badge.