Choose the right grammatical form in each gap to complete the text

Hi, I'm Sarah. I'm 12 years old. I have a sister. My [sister's|sisters'|sister|sister'] name is Lilly. She ['s|'|s'|'is] 11 years old. We live in one room. We ['s|'ve|'|s'] got many things in our room. There is a table, a bookcase with a lot of books, a wardrobe for our clothes, two beds and two chairs. My chair is red and [Lilly|Lilly'|Lilly's|Lillys'] chair is blue. Our beds are brown. We haven't got any [toy|toy's|toys|toys'] like dolls, balls or building blocks. Such toys are only for children.