Due to the water conference happening at my school, we were told to create an animation of anything involving water. I chose the water cycle, specifically the one for rivers.
This animation was relatively easy but it consisted of many layers and frames. I think the only problems I ran into was the timing and the shape motion tween. I had to be careful with the timing because of the many frames but it all turned out fine. The shape tween for the river looked quite awkward after the process of precipitation. Other than that, it turned out fine.