A water bong is a very simple and fun way to smoke your weed. The shit you need to make one can easily be found around the house:

What You Need:

1 Plastic Bottle
1 Peice of hose (5-10 cm long)
1 Cone peice
1 Sharp knife
1 nice bag of buds
1 lighter

How 2 do it: cut a small round hole in the side of the bottle, about 3/4 of the way down. This hole needs to be big enough so the hose can fit in perfectly. If the hole is a bit big, use blue tack to fill it in. IT NEEDS TO BE AIR TIGHT! stick the hose in on an angle so that one end of it is near the bottom of the bottle and the other is sticking out a bit. fit your cone piece on the end of the hose. If it doesn't fit, use blue tack. pour water into the bottle so that the water level is up to the hole. Don't put too much in because you don't want the water coming out the cone piece. pack your cone and spark it up. You should suck from the mouth of the bottle.