Because I have such fond memories of playing the Island of Dr. Brain, a game I'm fairly certain only about five people remember. It was part of a larger educational series of games created by Siera On-Line during the golden age of edutainment products of the early 90s. One of the stages in the game was a jigsaw puzzle of a lagoon with flamingos. It's not a particularly difficult part of the game, but the entire puzzle was made of pieces that were animated. As a kid it made the game significantly more engaging.