I have chosen quite at random "One Rose" - free clipart image from Designer.com to practise animation with Jasc Animation Shop.  The result was amazingly pretty animated picture reminding me sort of technique used by one of my old Czech friends prof Milan Calabek, sort of camera running instantly to capture the growing process.  Only than I realised that the original image was  probably animated too (consists of frames or layers) and that I myself obtained the frames by "pour chance".  As the good web sites updates their pages often (and Corel.com is a brilliant one), you can see the same animated gift there too now (2000!) (designer.com/freebies/clipart.htm).