On Amazon you can pre-order movies, games and more. I have often ordered movies that I knew we were going to purchase. The benefit of pre-order is that the day the movie comes out, you will get it in your mail box from Amazon. Amazon will also pay you the difference back if at any time you pre-order and the price drops, between when you order and it ships. They send you the difference back.
Currently they have Rise of the Guardians on pre-order for $22.99, this is the Two-Disk combo Blu-Ray and DVD + Digital Copy + Ultra Violet + 2 Promotional Toys!!
If you have not seen this movie, I HIGHLY recommend it. I thought it was great! It might be a little intense for your littlest kids, but it was so entertaining for adults!
Go HERE to get yours!

Part comedian, part Dad, part athlete. He will boss around your children while they play ball.
Just as angelic as she looks, this girl could easily raise a Village by herself, and all the children would grow up to be President.
Self proclaimed, she would be a webkinz dog. Because, "they're cute, and puppies are too. And they're sweet and they always get along with other puppies."
This mini-Martha Stewart can handle ANY craft you send her way. She isn't all bows and rainbows, she's got karate kid moves!
Not "Pick-Me-Up" like caffeine, she wants you to pick her up! AND NOW!
Anything that can be destroyed WILL be destroyed!
Practically Perfect in Every Way for now! Nicknamed "The Panda" she is rolly polly and lives by the motto, "the little one, is KING!"
The resident Labradoodle, Miller got his name because Mom won and got to name the baby! Need something chewed up? He'll take care of it. Especially if it's expensive..
My daughter is 3 and loved it and still talks about it.