This is an animation of a ball falling on a Kapla tower that I created in Blender 3D. Update: I fixed the frame rate. I learned how to use FFmpeg, and I could convert the .mp4 video to .png.
I used Blender 3D 2.79: https://blender.org/download/releases/2-79/ All of my Blender 3D simulations are on my studio: https://scratch.mit.edu/studios/34787653