I’ve done a handful of animations lately:

Gas Prices - Animated Bar Chart for Excel
Gas Prices - Animated Bar Chart for Excel 2
Gapminder for Excel
Rolling Wheel Animation

This example shows the position and path of a moving projectile which is launched at a given velocity and angle. The math is high school physics, with a little calculus [...]

In Presidential Demographics, Part II, Robert Kosara has posted a very nice interactive infographic that allows you to answer a host of questions about US presidents:
Would McCain be the oldest US President? Would Obama be the youngest? Who was the youngest president? Were presidents younger in the past or older? What is the highest number [...]