Incoming Resources
- Faces and vases!, optical illusions, by Spencer Brinker
- What is sight?, Molly Aloian
- Motion commotion!, optical illusions, by Spencer Brinker
- Sight, Kay Woodward
- Color craziness!, optical illusions, by Spencer Brinker
- Seeing, by Lisa Owings
- Inside the eyes, Karin Halvorson ; consulting editor, Diane Craig
- Eyes and ears, Seymour Simon