Chemical laxatives can cause side effects in children and many, including Miralax, are not approved for use in children under 17.  Magnesium, Senna, Vitamin C, salt, and oil can all be used for safe, effective and immediate constipation relief in children.  These natural home remedies work in different ways.  What is causing your child’s constipation and how constipated they are, will determine which of these home remedies is the best for your child to bring them immediate relief from their constipation.