мальчик
if your trying to say your a little fat you would say te chuchutz polnaya
in Russian :"boy" means hlapczyk.
Russian for "just a little" is чуть-чуть, pronounced choo-choot.
Russian for 'very little' (as in: - Do you speak Russian? - Very little.) is немного (pronounced nemNOga).
To say "a little bit" in Russian, you can say "немного" (pronounced as "nemnogo").
In Russian, you can say "малыш" (malysh) to mean 'little one'.
Маленький ребенок is little baby in Russian.
The word "boy" in Russian is "мальчик" (mal'chik).
Russian for "little sister" (meaning younger sister) is младшая сестра (pronounced MLATshaya seeSTRA).
You can say "маленький монстр" in Russian to mean "little monster."
The translation for "good boy" in Russian is "хороший мальчик" pronounced as "khoroshy malchik".
Russian for "Little brother, come here" would be Idi syuda, malenkiy brat. It sounds strange in Russian, but then so it does in English :)