This fun spot-the-difference puzzle is driving everyone crazy and it looks easy at first. You have four cute cartoon donkeys, all standing in the same position and smiling. They all have the same colors, same ears, and same little patch of grass under their feet, which makes it hard to see what is different.

At first glance, donkeys number one, two and four look almost identical. They are all smiling with their mouths open and their little pink tongues are inside their mouths. Their eyes are looking to the side and their tails and hooves are exactly the same, so you have to look very close to find the odd one out.

The difference is in donkey number three. If you look closely at its mouth, you will see that its tongue is sticking out of its mouth, while the other three donkeys keep their tongues inside. It is a small detail, but once you see it you cannot unsee it, and that is what makes this puzzle so satisfying.

So the answer is donkey number 3 is the different one. Most people need more than 10 seconds to find it because the brain thinks all four images are the same. Did you find it right away or did it take you some time?