My brother, who was 3 at the time, woke up at 4am and "destroyed christmas".
My parents used to double gate the hallway where our bedrooms were, which restricted our access to the bathroom, linen closet, and their bedroom. One gate would go on the bottom, flush with the floor because I have a sister who was a pro at playing field mouse and could squeeze under even the tiniest bit of space, and one just above it (after instilling the fear of all that was holy that if we climbed over both we would surely fall and crack our heads open like eggs and spend all Christmas in the hospital). Apparently the space between them was JUST enough for my brother to get his fat little head through. He started off by throwing all the extra rolls of toilet paper from the linen closet out through the gap in the gates.
At some point he painted the floor with shaving cream, and then decided to see if he could get himself through the gate. He opened every single present under the tree, took all the candy out of people's stockings and hid it in the couch cushions, and then apparently guilt took over because he re-wrapped some presents with toilet paper and was trying to climb back through the gates. We were all awoken at 6 something to him screaming because he was stuck trying to get back through the gates.
Also he did not like a few of his stocking stuffers (we've always gotten socks, underwear, and a toothbrush in our stocking in addition to candy and little novelty gifts) so he threw them out the dog door into the snow.
This will be the second year we can't double gate his bedroom door before he wakes up as a reminder because he's in the military and stationed across the country, and last year he was in Afghanistan.