velocity sensitive illuminated dance streamers

The fun person has streamers of optical fringe on their costume, A LED & CPU note the velocity then change the color of the viridescent streamers to go with the speed, Then synchronized dancers (fine art) have synchronized costume colors!

Also, athletic runners could have visible, coachable instant pacing, and, children could have fun with responsive color streamers when playing.

As a catnip laser mouse toy, the tossed about catnip mouse could light up its streamer which might be like optical fiber to reiterate the well known laserpointer cat phenomenon, while under cat guidance.