IAL 7: Specials: From Playlist for Group Activities:

1. P-list: 1492: Conquest of Paradise Theme: Vangelis: HD | 4:48: Enough of the boats. They are there at the start. Alternatively, 1492: Conquest of Paradise Theme: Vangelis | 4:46: Too few boats, but torches. For Columbus Day: Oct12.
2. P-list: O Canada en Francais | 1:32: For Canada Day: Jul01. The national anthem sounds better in French, but so does everything.
3. P-list: Pinna illusion | 0:00: See the caption at Wikimedia Commons: Pinna illusion and the article at Scholarpedia: Pinna illusion. Which way does the spiral spiral in?
4. P-list: Regenbogen | 2:22: By Annett. For lyrics see version 2.
5. P-list: Spinning Dancer | ∞: Which way is she spinning? Either way--the usual cues have been omitted and the mind decides. You can make her reverse by looking at the shadow of her feet. See the caption at Wikimedia Commons: Spinning Dancer and the article at Wikipedia: Spinning Dancer.