It is generally recommended that children be at least six years old before taking Tylenol in pill form. However, it is always important to consult with a doctor or healthcare provider before giving any medication to a child. The appropriate dose and form of Tylenol for a child will depend on their age, weight, and specific medical condition. Children under six years old may be able to take Tylenol in liquid or chewable form, depending on their age and ability to swallow pills. Again, it is important to consult with a doctor before giving any medication to a child.