At the same time there is nothing known about the biochemistry of creatine that would cause us to predict any problem. Some youngsters do take creatine and have reported some of the same benefits as reported in adults. There is more to building muscle than taking creatine. Gender hormonal status, nutritional habits, genetic makeup, and resistive exercise all play a role in muscular development. My personal view as a father of 6 is that sports in childhood, should be a time of learning and fun, not of hard training and muscle building.
Muscle contains lots of water.
More muscle size means that you will have more water in your body as your muscle grows. It is estimated that up to 6.4 million pounds of creatine are consumed each year yet no controlled studies have found any toxic effect. It is the cheapest creatine in the world. Poor quality control manufacturing procedures and impurities keep reputable US distributors and companies from selling the raw powder or putting it in other delivery systems such as creatine gum or creatine wafers. Pure creatine is then made into products that people that are both convenient and effective.