The Mathematician (1976)

Disney used animation here to explain through this wonderful adventure of Donald how mathematics can be useful in our real life. Through this journey Donald shows us how mathematics are not just numbers and charts, but magical living things.

In Don Hertzfeldt's second student film, a hapless cartoon character is dragged through a spectrum of cinematic situations by his frustrated animator.

Plumber Donald is using a large magnet in his work. When he drops it, it causes trouble for Pluto, especially after Pluto swallows it. Things begin clinging to him, especially his metal dog dish.

When Day, a sunny fellow, encounters Night, a stranger of distinctly darker moods, sparks fly! Day and Night are frightened and suspicious of each other at first, and quickly get off on the wrong foot. But as they discover each other's unique qualities--and come to realize that each of them offers a different window onto the same world-the friendship helps both to gain a new perspective.

Donald is leading a scout troop consisting of his nephews on a hike in the woods. Donald isn't nearly the expert on the woods that he thinks he is, much to the amusement of the boys. In a bid for sympathy, he douses himself in catsup and fakes injury; the boys bandage him so thoroughly he can't see, and he stumbles into a pot of honey, and is soon getting all too much attention from a bear.

Plankton's tangled love story with his sentient computer wife goes sideways when she takes a stand — and decides to destroy the world without him.

It's spring, and Tom is much more interested in the female cat next door than in Jerry.

It's a grand day at the beach for Tom and his girlfriend Toots - that is, until Jerry shows up (and, for a while, gets a rather vicious crab involved as well).

Phineas and Ferb travel across the galaxy to rescue their older sister Candace, who has been abducted by aliens and taken to a utopia in a far-off planet, free of her pesky little brothers.

Animals band together to save the day when the evil Otto Von Walrus hatches a sinister scheme to accelerate global warming and melt the Arctic Circle.