Balloon animation

I created this animation in Adobe Flash. The balloon follows a motion guide and the balloon size was set for the first and last frames with the Flash program creating the frames between the two (tweening). The appearance of the cloud changing into the sun in the last few frames was accomplished with 'tweening' between the two shapes over the last few frames. I created the motion of the flying birds by changing the shape frame by frame (stop-action or frame-by-frame animation) which was a bit time consuming.