This morning Tyler and I sat on the couch reading books before going to work/daycare. We were reading "Goodnight Moon" and I usually leave the last word - an object - off each sentence and Tyler fills it in e.g. Balloon, moon. I point to the object at the same time. The first page has a lovely full moon on it. So he dutifully supplies "Moon". The next page shows the moon in its crescent form. I point to it and wait for his response. Nothing. So I say "Moon" and Tyler responds " No! That's not a moon, it's broken!"