I found the video of the twin boys who kept getting out of their cribs. It's funny but pay attention to what they keep doing. They are "learning" and are displaying how they are learning by what they keep doing with the pillows. They are repeating the same thing in different places, they "want" to keep doing it, it's a part of "desire to learn" that is driving them.
These parents left a camera on their twins. What happened next is beyond cute.