1st make sure your turkey is completely defrosted. Next you need to clean your turkey. This part might gross you out a little. It's really not that bad...just do it, and don't think about it! Inside the turkeys rib cage area take out the gizzards (umm some people use it, but I just throw it out). Now rinse it out.
2nd put turkey in a pan with at least a one inch lip. You want to make sure you have enough room to hold all the yummy juice.
4th in a preheated oven (350 deg) place turkey. Every half hour use either a turkey baster or ladle (if your son is using your turkey baster as a water gun) to pour liquid from the pan over the turkey to keep it moist. If your turkey is starting to brown a little too much cover with aluminum foil. Oops as you can see I did not use the foil. It's okay it will still taste good. Your turkey should reach a temp of 190 deg. Don't cut it yet!!! It needs to sit and cool for a bit.
Oh and don't throw away the bones from the turkey. Put the bones in a large pot and cover with water. Let it simmer on the stove for a few hours. Then drain out the liquid and save. Now you can throw out the bones. :) Use the broth to make soup. Just add chopped up turkey, noodles, and chopped carrots and celery. You don't even need to season it. All the flavor is in the broth. Sorry I don't have exact measurements, but I just eyeball it.
Enjoy your dinner...and lunch...and turkey soup. Oh and you can freeze the soup too.