Children are generally more susceptible to rashes than adults.  By using a specialist childrens sun cream, not only are you guaranteeing high levels of UV protection, but also dermatologically tested lotion which is kind to delicate and sensitive childrens skin.  If using adult sun cream on young children, it is recommended to apply a small amount to an area such as the inside of the upper arm, which is not usually exposed to the sun.  By applying the adult sun cream in such a way, before going out in the sun, parents are able to ensure that no irritation or rash will develop.