the Grand Duke died in 1909, his grandkids at the time were very young
Elena's daughters Olga, Elisabeth and Marina was 6, 5, and 3 years old.
Kyrill's daughters Maria and Kyra was 2 years old and about a month old (the Grand Duke died in April, and Kyra was born in May) and of course Vladimir was not yet born until 1917, 8 years later .
I did however seen photos of Grand Duchess Vladimir with her Greek and Russian Granddaughters as babies/toddlers.
Andrei's suppose son Vladimir was 7 years old, but wasn't excepted at his imperial grandparents' home.
Boris had an illegitimate son Boris Lacroix (born 1902), but unlike Vova, little Boris was raised alone by his mother in France and hardly known his father.