Let's fill in the blanks based on the context:
1) **a** rocking horse
2) **a** tea set
3) **two** chairs
4) **a** radio, it looks like a mouse
So the completed sentences are:
Look at my **a** rocking horse. It's very nice. Can my tea set? It's **a** tea set. My chairs are **two**. And look at my radio! It looks like a mouse!