Coolest Dad ever!
(youtube) We sent my son's favorite train "Stanley" to space in a weather balloon with a HD camera and an old cell phone for GPS. He was recovered 27 miles away in a corn field and we got some great footage of the trip. This video documents the journey from liftoff to landing.
My 4 year old and Stanley are inseparable like Calvin and Hobbes. He's been attached to him since he was two, and they play, sleep and do everything together. I animated Stanley's face with After Effects and Photoshop to bring him to life how I imagine my son sees him.
Here's the original video I made of my son and Stanley when he was 2 years old, same basic concept: http://www.youtube.com/watch?v=M_1lnkUPUkI