The recommended dose of medication to give to children depends on their weight rather than their age. For Tylenol, the recommended dose is 15mg/kg/dose every 4-6 hours, up to a maximum of 5 doses per day. For Benadryl, the dose can be based on the weight of the child, with a more conservative approach for over-the-counter dosages. As for Advil, the dosage is 10mg/kg/dose every 6-8 hours with food. It is important to follow the instructions on the packaging for each medication and to consult a healthcare professional if needed.