Here's a fun "love compatibility test" for any romantic endeavor. Actually, it's rigged. No matter which number your interested party chooses, and it's a free choice, he or she will always end up on the heart, thus, making a "love connection." E-mail the URL to your love interest and tell them to take the love test. If they somehow end up on the heart, you can prove that "love conquers all."
Interactive Web Magic: "The Clock"
Here’s an interactive magic trick that works across the web and you can have fun showing your friends. The secret is based on a simple mathematical principle.
Michael Bach's Optical Illusion Page
53 Optical Illusions & Visual Phenomena with explanations. This will keep you busy for awhile.
53 Optical Illusions & Visual Phenomena with explanations. This will keep you busy for awhile.