How to make a paint bomb
You need a used light bulb (usually screw fittings are the best), small
hammer, screwdriver, stanley knife, pvc tape, clay or similar and of
course some paint.
Remove metal top, by cutting to vertical linesfrom the edge of thefitting, then remove.
Snap the little glass cylinder on the inside of the bulb.
Place bulb on a soft underlay, and make a hole in the inside glass divet by gently hitting the screwdriver with the hammer.
Fill with paint.

Seal the hole on top of the bulb. Clay works quite well for this. Then replace the meta; fitting, and seal with pvc tape.
Finally, go find yourself a nice white wall to paint. Or, a nice big corporate advertising board... but I never said that... :)
Link.
