Really cute and novel. I have seen local kids using “blinky-chase light” LED dog collars as part of their costume. Now here’s an annoying idea for an adult party costume; attach a dozen or so lights to your garden variety ninja suit then put all of them in strobe or SOS mode, gauranteed to get you noticed [and yelled at!].
Oh, clever. So you're thinking attach a handle to the back of a kid and use it as a flashlight. Interesting idea. It's quite cute, but it doesn't appear to have much throw.
Most of us here couldn’t resist the urge to mod the kid, and all of the sudden we have a toddler running around with heatsinks attached, pushing out 600kcd at 10amps. Now you’ve got a toddler who can literally blind people at will.