Hole Punch

The other day, my son woke up and notice a single hole puncher on the dining room table.
Immediately he scurried over to the table, climbed up on the chair at record speed and said, what is that?
I told, oh, this is a cool device that can punch holes in paper. So he began to try to squeeze the handle together in hopes of seeing how it punches holes.
His little hands were a bit weak at forsst, but after 2 trys he was able to squeeze it all the way down.
Then I showed him how it worked, we slide the paper here and then squeeze.
When I punched the hole in the paper and showed him what happened, he looked at me like I had just discovered the photosynthesis equation for how to grow money on trees! It was just sooooo totally amazed. I could see his mind working! Like, Whoa, how the heck did that happen, and why didnt they tell me this before!?
Then I showed him where the left over holes go, he opened the chamber and all the little white dots fell into a clump on the table.
He look at the pile, grabs it and throws it in the air, and shouts, its SNOWING!
I just loooked at him like, how did you know that?