Grandpa in My Pocket (2009)

meet Jason and his old Grandfarther, they play games, have fun and laugh. but Grandpa has a secret that only Jason knows, he's in possession of a magical black flap-hat called: "The Shrinking Cap" which has the magical powers to make one shrink and enlarge themselves. join them on many adventures as Grandpa shrinks down to a teeny few-inch-tall man and gets into lots of adventures of solving problems, playing tricks, getting into a little bit of funny mischief riding toy vehicles and bringing objects to life.