When does puberty begin in a boy?

Boys begin to experience changes in their body (puberty wise)  between the ages 13 to 14 whereas girls experience it between 11 and 12. Refering back to Faris sifd answer, yes we do start to enter puberty in the developing stages at 11 years old. However, in most cases of puberty in boys is between 13 to 14, big changes begin between these ages

(Please mind my grammar in the last sentence).

Anytime Between 11 And 14

As I have read, boys enter puberty at age 11

I think puberty start when the boy is 11 years old.

Between the ages of 9 to 14yrs.

Yeah starts 11.im 12.only changes ive got is sweat in the armpits

Around 10-15

The age is different for EVERYBODY..there really is no set time when it occurs.
Generally between 10 1/2 - 14 yrs.

It differs for different boys.  But you will notice your voice starts changing and you will start to get facial hair.  You'll know it when it happens.  By 13 you will probably know it for sure.