It gets hot, hot, hot in the summertime so it's important to keep lil ones out of the sun between 11 a.m. and 2 p.m. when its rays are the most powerful. If you are venturing out, keep your child protected with appropriate clothing, shades and sunscreen. And, in the event that you or your youngster gets burned, follow these sunburn instructions from WebMD to stop the UV radiation and relieve discomfort. It said:

• Get out of the sun
• Cover exposed skin
• Ask you pediatrician which, if any, medications are useful, especially when started early.

To see the rest of the tips, read more.

• For mild sunburn, cool compresses with equal parts of milk and water may suffice. You may also use cold compresses with Burow solution. You can buy this at a drugstore. Dissolve 1 packet in 1 pint of water. Soak gauze or a soft clean cloth in it. Gently wring out the cloth and apply to the sunburned area for 15-20 minutes. Change or refresh the cloth and solution every 2-3 hours.
• Anyone raised in a beach community knows the secret of aloe-based lotions. There are many commercially available types. Ask the pharmacist at your local drugstore. Tearing apart your aloe plant in the yard and applying the cool jellylike substance inside the leaves is no longer necessary
• Cool (not ice cold) baths may help. Avoid bath salts, oils, and perfumes because these may produce sensitivity reactions. Avoid scrubbing the skin or shaving the skin. Use soft towels to gently dry yourself. Don't rub. Use a light, fragrance-free skin moisturizer
• Avoid lotions that contain topical anesthetic medications because you can become sensitized and then allergic to that medicine.

Source