Hungarian artist Gergely Dudás is a master of camouflage, creating hidden picture puzzles that quickly spread online.
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In his artworks, he challenges people to find a panda among snow whites, a card among gift bags, and a heart among elephants. He also published a holiday puzzle book called “The Fun Bear’s Hidden Objects Book.”
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In his latest work, he invites you to find four ghosts.
Did you manage to do it?
If you didn’t or want to check if you are right, look here:

More brain exercises can be found here.
More “Attention Challenge” tasks can be found here.