A
- Archimedes' Laboratory: Illusions and puzzles
- Athabasca University's Centre for Psychology Resources (AUPR)
E
- Exploratorium Museum of Science, Art and Human Perception: Online exhibits
- Exploratory Science Centre
- Eyetricks.Com
G
I
- Illusions-Optical.com: Gallery of static and animated illusions
- Illusion Works: Interactive demonstrations
M
N
- Neuroscience for Kids: Interactive gallery of visual illusions
- NIEHS Kids' Pages: Optical illusions
O
- Optical Illusions
- Optical Illusions: Collection of visual, scary, and funny illusions
S
- Sandlot Science: Optical illusions and brain teasers
- Skeptic's Dictionary: Pareidolia
U
- University of Colorado at Boulder: Illusions and sensory phenomena
V
- Vision Science: illusions and demonstrations
- Visual and Auditory Illusions