Growing up we got to open one present on Christmas eve but the rest had to wait until morning. I think my parents just got tired of being hounded and decided to give in and let us open one. heh.
Here's a guilty secret. One year when I was about 9 or 10 or so, I snuck out and unwrapped all my presents in the middle of the night and re-wrapped them all for morning. I evidently had to learn first hand about the value of waiting and anticipation. It wasn't worth it of course because opening them in the morning was so anticlimactic but I was sensitive to my family's feelings and pretended to be all excited anyway.
I did it that one time and never again. Ornery little cuss wasn't I? :^P
Prairie
My children did that one Christmas, too, when they were eight and ten years old. I knew it because of their bad rewrapping job. I never let on that I knew till after they had opened them all on Christmas Eve. Then I told them I knew and asked them if it was as good as being surprised.
Next year, no problems. LOL
ROTFL! I did that one year, too. I think I was 11. I snuck out into the living room and took one at a time back to my bed and peeked, then rewrapped it and put it back under the tree. Went through every single one of them.