David Hisle made an alphabet video for toddlers.
Our 2 year old loves those shape, color, and alphabet animations on YouTube, so I've started making videos for him that feature both a train and a truck (his favorites--him and every other 2 year old boy.)
I used the free / open source animation program Blender 3d and wrote the music on the iPad version of Garageband.
Other stuff by David Hisle:
That’s all, folks!