A video I put together with my 2 year old daughter using Adobe After Effects.

https://www.youtube.com/watch?v=Li87XPLz1AA

And she did these two almost entirely by herself when she was 3, after I set up the camera.

https://www.youtube.com/watch?v=v3roxSdMF-w

https://www.youtube.com/watch?v=rW_Krn1qbaw