yes its him. The five kids that appears in the picture are...
-Princess Irina Alexandrovna (b- 1895, Six years when the picture was taken)
-Prince Andrei Alexandrovich (b- 1897, four years " " ")
-Prince Feodor Alexandrovich (b- 1898, three years " " ")
-Prince Nikita Alexandrovich (b- 1900, 1 year " " ")
-Prince Dmitri Alexandrovich (b - August 1901, few month, not more than 5 when the picture was taken)
BTW...here another pictures of the same photoshoot
Also posted on "Princess Irina Alexandrovna" thread :

Xenia, Sandro and some of their children

Princess Irina Alexandrovna and some of her brothers