What's up with sand? Here, here (listen to this one) and here
What is Econ? -- Crash Course
Production Possibilities Curves -- ACDC Econ
Specialization and Trade -- Crash Course
For you music pleasure: The Rolling Stones and Mick Jagger here , here and here. Maroon 5's tribute here
Sometimes, a nonsense 1970's Italian song is what you need...