Sorry, J., you're kids are spoiled because you spoil them and allow the behavior. Do you say "NO" to them? Do you tell them this is a WISH LIST and NOT everything you are going to get? Is that how it's been in the past?
How about trying this...
1 present they WANT
1 present they NEED
1 present they WEAR and
1 present they READ
Period. end of story. Why do you have to shower them with gifts? Why does it have to be overboard? It took us several years before my mother in law died to get her to STOP with the overload. Set the rules. Set the boundaries.
Tell your kids - no better yet - SHOW YOUR KIDS what Christmas is about...it's NOT about getting 100's of gifts...it's about celebrating the birth of Christ. There were Three Kings that brought gifts...why do they need more than that?
How can you change it? You can STOP indulging them. STOP giving them all that they ask for.
Tell them EXACTLY how it will be. Let them throw a tantrum. Then you can take them to a shelter and show them just how good they have it. They DO NOT NEED MORE...
If your son plays with all of his toys? Put them in storage boxes and rotate them. As he outgrows them, DONATE them to a shelter. Have him take the box in and share it with the kids in the shelter who have NOTHING.
My kids get 4 gifts from us. That's IT. My mom is dead and my dad is trying to survive his first Thanksgiving and Christmas without his wife of 56 years. I doubt my father will make it to the store to buy anything. My father in law died this year as well. They get presents from my sister and my husband's sisters. One each - as that's the rule we set. My brother doesn't send gifts - which is fine by us!! HE calls and they have a joyful conversation with lots of laughter...heck my oldest son and my brother play chess over the phone....better than anything you can buy!
The only way this is going to change is if YOU stop it. STOP going overboard. STOP excessive giving. Use the KISS method and try the list above - 1 that they NEED, 1 that they WANT, 1 that they WEAR and 1 that they READ....then find a food kitchen that you can volunteer in...show them MORE to life than gifts...
Hope this helps!