In my preschool classroom we use letter of the week items. I try to include many real creation facts into the week. This has had an amazing result on the students. Many parents are surprised at the new thing their kids are interested.
One example is the letter O for octopus.
Octopus, lives in the ocean, has 8 arms and squits ink. Cool right!
I have grouped together a book, counting cards and few playdough activities, and a coloring sheet.