youre to young, TRUST ME, wait till you have experiance and an open mind or i bet a 95% chance you will have a bad trip and regret that you tried them, o and im expecting that you are wanting to take a halucinogenic dose, not a pussy dose....wait till you 15 at least and your body is matured to an extent, becuase it sound like your body is not very matured yet cuz you short and weagh nothing, dont do it when you fucking only 13...not trying to be an ass just saving you a lot of trouble...stick to weed for now buddy, and by the way i was short and wieghed nothing too when i was your age and i never tried shrooms till right before my 16th b-day.