Creation Cards by Apologetics Press are so much fun! I got these a year ago at the book fair. They are large, full color flash cards with different aspects of God's creation. On the front is a beautiful photo, and the back has simple statements to share with your child about the photo.
My 1 and 3 year old boys like to sit down with me and go through these cards. Now, I've seen similar "nature cards" at WalMart and other places, but these are definitely more biblically based. I like the easy creation lessons that stem from them.