We read Stellaluna by Janell Cannon to start out our bat day. I found some cute free activities to go along with this book here.Crayola's website also has some fun bat and other Halloween activities that I printed off for my son to do. He wants to be a bat for Halloween so it was a great theme to talk about what bats are like.
We also played with these bat rhyming cards.
You can check out what we did last year here.