I found this on Taka’s Blog, and MAN do I want a few sets. It is an LED that is activated when the yo-yo starts spinning like the Yomega Strobe or Duncan Pulse, but this can fit into alot of conventional yo-yos and changes colors.
It is a LED with Circuit board that fits inside the cap of clear yoyos. this kit will fir the Freehand Zero, Hyabusa, Journey, FH2 and Patriot.
You can buy them here at the Spingear store. The cost is 500 Yen which is just shy of 6 bucks.
UPDATE: I am also told these are headed for YoYoGuy…..