My earliest animation attempts were hand drawndirect on to old clear 18mm film since I couldn't afford a movie camera or cost of film development. But it was a case of stop that or go blind. Then when the Internet arrived animated gifs were great fun to make. And along came Flash and Fireworks adding all kinds of possibilities. Nowadays cheap and free specialist animation apps are here - easy to use, stylus drawing directly on screen. Fantastic. I just wish I had time to indulge.
These links below are to my interactive Flash SWF files - only worth the bother if you have the Flash media player already installed on your desktop machine. These files are not supported on mobile devices, much to Adobe's annoyance.