Spot the Difference with Lea, Lilou and Lee Game

How to play the game "Spot the Difference with Lea, Lilou and Lee Game"?

Lea, Lilou and Lee are very confused. They are looking at the same two images... or are they?! There seems to be very small differences between each scene, and they’re getting very muddled up. They’ve even pinched themselves to make sure they’re not dreaming! Can you help pick out the differences in these pictures and clear up this confusion!