I didn't know you knew that

I am surprised daily by how much Sam knows. His language skills are improving, but obviously he knows a lot more than he just comes out and says. If I read a story and pause, he will fill in the next word, or make a sound that is like that word. Today I discovered that he can count to six. I was counting things in the book and asked him what came after two and he said three and when asked what came next, he went on to say four, five and six! Things got a little fuzzy for seven and eight. He's also starting to sing along with parts of the alphabet song - what fun!