I want to do exercises for increase my arms muscle, chest, pectorals, etc.
That would be easy on a Gym but that is so expensive here in Mexico and i want to make exercises at my house without the need of machines or any other extra stuff.

The only ones i know are:
Lizards:

those are supossed to exercise pectorals and arms with posture variations.

Abdominals:

well, i guess everybody knows this one.. helps the abdomen.

Back:

Well that is for exercise the lower back part.

Those are the only i know, and i would like to know some exercises, anyones, but being especifically, that would help me with the upper back part, shoulders, forearms, and some more for pectorals.
Would someone help me? thanks in advanced

I don't know what the name of this exercise is, but pick up a brick and hold your arm straight up in the air. Now let the brick fall behind you. Your elbow will be straight up in the air, then pull the brick back up to extend your arm to the sky and repeat for a full set.
Duplicate with the other arm and do 3 sets.
repeat daily until youneed a bigger brick.

1 suggestion I could give is that you purchase a dumb bell, there are so many variations of exercises you could use to train your chest, pectoral, trapezius, biceps and triceps ... etc with them

Yeah i guess im gonna buy that, i've found lots of tips for exercises done with 1 dumb bell or tow, but here that kind of stuff is usually expensive, and i didnt want to spend my money on that, but oh well i gotta need it.

The brick sugesstion is a nice idea, it would work like the dumb bell thx for the tip jlhaslip.

But before you buy a dumb bell, try to gauge how much you want to start with. It would not be wise for you to buy a 20 kg dumb bell in the start, so choose wisely. Perhaps you could buy a blank dumb bell and purchase additional weights as time goes by.

Good luck

My brother always does this kinda stuff, and did you know that if you do it at a young age, it will make it harder for you to grow, but he started when he was 6 ft.

Well im 15 years old. And im 5.4 ft. Do you think im young enough for do that kind of exercises?

Well, anyway, i guess im tall enough now, i just want to get some muscles, cause appearance its everything at adolescense.

if you are still growing you should not do weights. if you do, make sure you are not working at capacity. For example if you do a bench press and your maximum weight you can press is about 200lbs. you should only do about 70% of your maximum. Meaning you should only ever goto about 140lbs.

The reason is because it will make you shorter. You won't be growing properly. Trust me, you don't want to be short.

As for home workouts.

I would recommend spending the money to buy a set of dumbbells and a work out bench. you can usually find used sets including the bench for under $50. This is a good investment and you can work on almost any muscle group.

Awww... but is that i want to do weights cause im so slim and i want to increase the mass of my muscles for give a better impression.
I've tried lots of things to get fatter but i cant' i eat more, i stop doing activity (such as doing sports, run, etc, those activities make people loss weight and i do them so often) but i cant get more weight. Thats why im starting to increase my muscles.

But i will try everything people tells me here, i will consider that of stop growing up properly.
Also i want to know what kind of food makes people get fatter, as i said, i want to increase my weight.