You've no doubt read the popular series of children's books called Where's Waldo?, where you have to spot the white and red-striped Waldo in different illustrations which features dozens of people doing various activities.
Now a group of friends have created an adult version as part of an art installation project. Called Subtle Dildo you have to try and find the flesh-colored rubber dildo in a series of photos.
Their website calls it "An installation art project about the place of rubber in our lives." They also have an Instagram account where they post new pics.
According to the creators, the blog is “an installation art project about the place of rubber in our lives.” And some of those places are surprisingly difficult to find.
So take a look below and see if you can spot the subtle dildo.