+1 Here is a pic of the one I did on my buck a couple years ago. Not a perfect job but it came out good for my first try I think. The kits are cheap and come with all the instructions. Like critter said one weekend and your done. Would be a fun project for you and your kid.Do it yourself. Cabela's sells kits to boil the skull and mount them onto a board.
It can be done in a weekend. A few hours to clean the skull and a couple of hours the next day to mount it.