bedtime stories

I've been reading a story to Darren every night as part of his bedtime routine since he was just a couple weeks old. Just recently he has been very attentive during the stories and looking at the pictures. Last night he started reaching for the book and playing with the pages and of course the pages went right for his mouth. After I took it out of his mouth he helped turned the pages and cried when the story was done, we wound up reading the story four times last night!