don't give up on the squirrels and most of all ; "Don't give up on your son" he may surprise you.just have a good talk with him about all the days you have deer hunted and not taken a deer , then talk squirrels.I think he will understand ; Kids are smarter than we thank.

I always be in the woods befor the first light and set and wait ; just like deer hunting.they will come out(even if the wind is blowning) they just slide down the tree and feed on the ground.when they are on the ground they are more wearey.you have to walk and set real slow.

good luck,and hope he has more luck in the deer season,just be patiance and have fun with him.