Game developer Ryan Henson Creighton took his daughter to the recent Toronto independent game jam, and let her make a game (with some help). I hope your teeth are ready for all this sweetness.
Ryan's daughter Cassie designed all the game's non-player characters, did all the art, the game's intro sequence and credits, and even (you would NEVER GUESS) provides the voice for the game's main character, Sissy.
The finished product is Sissy's Magical Ponycorn Adventure. You should play it. Right here, right now. Unless you're currently, you know, on something. Then you might to wait a bit.
5-Year-Old Girl Makes Video Game [Untold Entertainment]