You lot and your beer. Here's how to make something bloody amazing:
1. Go to the supermarket and buy a hell of a lot of shitty bottom grade sugar packed apple juice.
2. Take it home and boil it for about 30 minutes to get rid of all of the preservatives.
3. Dump about 500g more sugar in every 4L of it and stir until dissolved.
4. Get a couple of big 2L coke bottles then clean it out properly.
5. Fill them to the top and let it cool to about 28 degrees C (you can work that out in farenwongles or whatever they are)
6. Stuff a sachet of normal instant bread yeast in each one.
7. Poke a hole in the lid for the gas to escape.
8. Get a condom and poke a hole in it. Don't use it by accident here. Cable tie it around the top of the bottle. This is your air lock.
9. Leave it until it stops fizzing (takes about 2-3 weeks).
10. PARTY TIME.
This is what I used to do as a teenager. If it tastes like ass then I suggest you use it to clean the toilet or as paint stripper.
Edit: to note - condoms were terribly expensive for teenagers but we found out you could just go and ask for them at the local sexual health clinic and they'd give you a load. Little did they know we were just using them to get smashed down the local park