Millie said "apple"

Last night after we got Millie ready for bed, we were looking at a book. I had taught her the sign for "clown" so I wanted to show her a clown and reinforce the sign. On the cover is an apple, balloon and clown. So I said, "Apple" and Millie repeated and said "apple" very clearly. I was excited. Then she was saying "ball" for the balloon. And was doing the sign for "clown."