One time we rented a Diego movie for our kid. I hid it after a few days so I didn't have to watch/hear it anymore (besides, it was due back anyway). When our daughter asked for it, I told her "Sorry, Diego got deported back to the video store this morning."


Then she grabbed her potty stool out of the bathroom, took it into her room and used it to reach on top of the DVD player (where I "hid" the video) and bring me the DVD and say, "No dad! It's right heeeeeeere!"
That was just yet another time that she grew mentally and physically faster than I anticipated and totally punked me. She never did get the joke though.