Wa'alaykumsalaam -
It is not permissible to display any pictures of animals and human beings -this prevent the angels from entering the house.
It was reported from Abu Sa’eed al-Khudri (may Allaah be pleased with him) that the Prophet (peace and blessings of Allaah be upon him) said: “The angels do not enter a house in which there are statues or pictures.” (Narrated by Imaam Ahmad; see also Saheeh al-Jaami’, 1961).