We've had bats flying across the windows in the library as part of a bat display for three weeks now. I cut the bats out from black cardboard folded in half (I used this Martha Stewart template) so they look as if they are flying and move if there is any breeze. They look very effective and have certainly helped the bat books be viewed and borrowed. Brian Lies' bat books which started with Bats in the Library and now has four titles were the most popular but the pinterest list here shows that we had quite a few to choose from and several toys. Bat Week is well worth celebrating book-wise.