Magnesium is so important! We are all deficient in it, and topically is a great way to use it, especially for children. This roller is perfect for traveling and won't melt like creams in the hot weather. This formula is made for children, to avoid the burning sensation but still providing magnesium benefits. Simply apply to feet at night for better sleep. Apply to areas of pain, specifically joints for growing pain. These come in a case of 3. Each one retail price is $18.00.