In that scene are hundreds of small figures. Among those figures is Waldo. The object is super simple. Parents discover that children can be quicker than adults. It is not unusual for preschool children to find Waldo faster than adults can.
Children focus on what they are looking for and see it.
I confess from personal experience that it is much too easy to make the Bible a spiritual Waldo book. Before we begin to study, we are trained to look for specific things. Then, when we read and study, we see what we have been trained to look for. One of the fundamental purposes of the Bible is to reveal the nature of God. Revelation of God's nature is the only means that we have to discover God's nature.