Some children will try anything. If this sounds interesting to all, then most children try not to think about the risks.

Of course, with some curiosity is perfectly normal. In fact, you should encourage your children to be curious, but only so far. Note that even young people need guidance from adults, especially in older children have more complex challenges and are able to risk more than a younger child.

Penis enlargement is certainly characterized as a complex task. But even with adult supervision, this should not in any still growing at trial. Why?
Because doctors are not studies for obvious reasons and I do not know what impact they have on development in other parts of the body, not yet fully developed.

If you have a medical condition that inhibits growth is necessary for an external (or internal) aid to support the penis becomes longer. After a small penis as a teenager is quite normal and most children will increase to 18-21.

Thus spake as Ricky Bobby in  Talladega Nights ,  Please, 18a  As previously reported, has not yet determined whether penis enlargement before this age is harmful to the body or not, studies have been conducted.

But they are not psychologically harmful. The whole situation even counterproductive because of the uncertainty caused by the  need  the enlargement of the penis in the first place. This could encourage some serious problems in some adolescent boys.