A very simple smoke grenade that you can make with nothing but 0.50 $ worth of equipment.
Use carefully. If not made properly then it mite make an inferno. (HIGHLY RECOMMENDED, step 5)
Step 1: Required Materials.
Step 2: Starting
make sure it doesnt go all the way thru
p.s. if you want good results and you have alot of ping - pong balls, try cutting them up and putting it in one big ball.
Step 3: Aluminyum Foil
or it will be impossible to light up
and make sure that its not ripped or you will have the flamethrower mode (step 5)