Here we have a picture that looks like the cover of an interesting book. Without ever having met the nice elderly gentleman and the young child we can pretty well guess what is going on.
Grandfather, a religious Jewish man is holding onto his precious grandson. The boy is 2 years old (no boys' hair cuts until their 3rd birthday). He is looking for a good place to stand close to the Kotel to teach the boy respect for Hashem and for His Holy place. Then, while holding the boy's hand tightly, with all his heart he is going to ask Hashem to guide the boy throughout his entire life.
How do I know I got it right? Because the story has be going on for 4,000 years.