Olivier Redon holds up one of his optical illusions that is designed to look like a creature whose eyes and head follow the viewer as they move about, at his home in Portola Valley on June 24, 2024.

Spot the hidden penguin among the ducks in this optical illusion and test your observation skills in 15 seconds ...

Optical illusions have taken the internet by storm. They provide a dose of fun and challenge people as well. These illusions encourage people to think in new ways and improve their observation skills.