So I recently constructed these poi out of very common resources. I'm still working on my design a bit.
Here's some photos to help explain!

The poi head is clear plastic tubing from the hardware store, the rope is just basic nylon cordage for camping and what not.

Golf ball handle attached to a ball-bearing fishing swivel.

The lights are photons/pulsars one is white, the other blue. The white material is from some costume tights. They help to diffuse the light of the LED's.

VICTORY HAPPY TIME FACE! woot.
I'll have some pics of them in action up here pretty soon.
I'm really happy with the rig so far. The tubing is heavy enough for nice stalls, ball handles make them quite throwable, and the swivels allow me to pull orbitals for dayssss.
Any critiques/additional input would be much appreciated!