бабушки

In a sentence

• Я иду к бабушке на ужин.

  I am going to grandmother's for dinner.

  Here, 'бабушке' is in dative case, showing the direction of moving towards the grandmother.

• На столе лежат бабушкины очки.

  Grandmother's glasses are on the table.

  Here, 'бабушкины' is in possessive form, indicating the ownership by the grandmother.

• Я видел много фотографий бабушки в молодости.

  I saw many pictures of grandmother in her youth.

  Here, 'бабушки' is in genitive case, used to specify the 'photographs of grandmother'.