Johnny In The Valley Of The Giants
Johnny and a group of boys (Boy Scouts, perhaps) are camping out one night when they discover a spooky old castle. The owner of the castle has a shrinking machine, and he uses it to shrink the boys to the size of flies. Johnny escapes the castle and winds up in a beehive, where he gallantly defends the hive and is knighted by the Queen Bee. He then mobilizes the bees and other forest animals to attack the castle and rescue his friends.