I did these animations as part of the edX course CSMM.104x. Animation and CGI Motion from Columbia University.
The animations demonstrate, I believe, my abilities to attain impressive results even with quite limited tools. The animation engine (which was being implemented during the course) operated only with dots and lines that connected the dots in two dimensions. The engine also modeled physical laws of motion, with new features being implemented throughout the duration of the course.
Week 2: Endless Game
The 2nd week's model had very few features. Only gravity, elastic linear constrains between particles, and static particles were available. I emulated 3-dimentional look for this scene, attaining an effect of a bouncing ball by using different (sometimes negative) gravitational constant between particles (some of which were invisible). The sun is moving, too!
Week 3: Clock
On this week, a new feature allowed to add a kind of an endless power source, creating a possibility of a complex movement that is stabilized by friction-like forces yet does not stop with time. Note, that the engine still had no collision detection. All interaction between particles were achieved by gravitational forces and elastic linear constrains.
Week 4: Sōzu
On week 4, finally, the model had a collision detection, although not perfect.
Week 5: Worm in Can
A better collision detection allowed to experiment with unstable scenes.
Week 7: Kite
This week, we could use wind. Note that the complex motion is a result of laws of mechanics; the engine had no ability to script an arbitrary path.
Week 8: Bowling
A scene with simple rigid bodies.
Week 9: Fishing Rod
Elastic rigid bodies were added this week. Yet, the engine still had no ability to script an arbitrary path. The scene is based only on the laws of mechanics.