Flight Of The Navigator

In Flight of the Navigator, 12-year old David Freeman (Joey Cramer) goes missing in 1978, only to reappear in 1986. In the eight years that have passed, David hasn't aged. It's no coincadence that at the time David comes back, a flying saucer is found. David also now possesses vast knowledge about the farthest reaches of the universe and is able to take the fantastic flying machine anywhere he desires...